"Backup fell back to a full" on delta backups
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@olivierlambert It is an NFS share on a Synology NAS
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Adding @florent in the loop
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@MBNext is it possible to post the full json (you can download it on the top of the windows that shows the backup progress )
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@florent see below:
{ "data": { "mode": "delta", "reportWhen": "failure" }, "id": "1759651200002", "jobId": "ea94a502-b7f7-4e21-bd5f-093a11caa22a", "jobName": "Delta Backup", "message": "backup", "scheduleId": "dc6f41bf-2c5e-49e8-8f73-c1b7f0d1735c", "start": 1759651200002, "status": "success", "infos": [ { "data": { "vms": [ "55795ce2-ed10-4d85-c365-6eae35d0c094", "3e351bfb-d758-75c6-1a17-564e6560c537", "6750c30b-ce59-0d09-cbdb-f7136f793d10", "97f1af10-f2d0-ea89-9097-f92503c15813", "16653035-869a-46fc-98c4-3a18f70ab38c", "d3f07943-5779-5c75-9436-422b453ddd4c", "4f932e56-9125-6512-955d-e5f6249c8c8b", "fab1e47e-6b23-ac6e-2f6f-cadee708a13b" ] }, "message": "vms" } ], "tasks": [ { "data": { "type": "VM", "id": "55795ce2-ed10-4d85-c365-6eae35d0c094", "name_label": "Debian 12 Template" }, "id": "1759651206787", "message": "backup VM", "start": 1759651206787, "status": "success", "tasks": [ { "id": "1759651206839", "message": "clean-vm", "start": 1759651206839, "status": "success", "end": 1759651206987, "result": { "merge": false } }, { "id": "1759651207473:1", "message": "snapshot", "start": 1759651207473, "status": "success", "end": 1759651221770, "result": "d028ce1a-df34-a99d-945b-ed6cb7232d45" }, { "data": { "id": "fde89f48-d384-4208-8243-de5755ea7434", "isFull": false, "type": "remote" }, "id": "1759651221770:0", "message": "export", "start": 1759651221770, "status": "success", "tasks": [ { "id": "1759651224150", "message": "transfer", "start": 1759651224150, "status": "success", "end": 1759651376950, "result": { "size": 4234149888 } }, { "id": "1759651379861:0", "message": "health check", "start": 1759651379861, "status": "success", "tasks": [ { "id": "1759651380004", "message": "transfer", "start": 1759651380004, "status": "success", "end": 1759651433663, "result": { "size": 0, "id": "2e5a80ab-ebc0-6fac-3978-ac2ffcc7bf11" } }, { "id": "1759651433664", "message": "vmstart", "start": 1759651433664, "status": "success", "end": 1759651436824 } ], "end": 1759651439096 }, { "id": "1759651439178", "message": "clean-vm", "start": 1759651439178, "status": "success", "warnings": [ { "data": { "path": "/xo-vm-backups/55795ce2-ed10-4d85-c365-6eae35d0c094/20251005T080024Z.json", "actual": 4234149888, "expected": 4235226624 }, "message": "cleanVm: incorrect backup size in metadata" } ], "end": 1759651441127, "result": { "merge": false } } ], "end": 1759651441162 } ], "warnings": [ { "message": "Backup fell back to a full" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:aa49c079-148e-69c9-f384-3a189e815d64" }, "message": "Snapshot data has been deleted" } ], "end": 1759651441162 }, { "data": { "type": "VM", "id": "97f1af10-f2d0-ea89-9097-f92503c15813", "name_label": "Xen Orchestra (Do Not Use)" }, "id": "1759651206781", "message": "backup VM", "start": 1759651206781, "status": "success", "tasks": [ { "id": "1759651206827", "message": "clean-vm", "start": 1759651206827, "status": "success", "end": 1759651206940, "result": { "merge": false } }, { "id": "1759651207473:2", "message": "snapshot", "start": 1759651207473, "status": "success", "end": 1759651208532, "result": "cf7376b2-1c46-16f6-7d8f-c842e6fdb024" }, { "data": { "id": "fde89f48-d384-4208-8243-de5755ea7434", "isFull": false, "type": "remote" }, "id": "1759651208532:0", "message": "export", "start": 1759651208532, "status": "success", "tasks": [ { "id": "1759651210883", "message": "transfer", "start": 1759651210883, "status": "success", "end": 1759651450600, "result": { "size": 6847201280 } }, { "id": "1759651452327", "message": "health check", "start": 1759651452327, "status": "success", "tasks": [ { "id": "1759651452473", "message": "transfer", "start": 1759651452473, "status": "success", "end": 1759651545489, "result": { "size": 0, "id": "390e08f7-f932-7e54-8298-b9e9d411add0" } }, { "id": "1759651545490", "message": "vmstart", "start": 1759651545490, "status": "success", "end": 1759651548464 } ], "end": 1759651550936 }, { "id": "1759651550982", "message": "clean-vm", "start": 1759651550982, "status": "success", "warnings": [ { "data": { "path": "/xo-vm-backups/97f1af10-f2d0-ea89-9097-f92503c15813/20251005T080010Z.json", "actual": 6847201280, "expected": 6848915968 }, "message": "cleanVm: incorrect backup size in metadata" } ], "end": 1759651562369, "result": { "merge": false } } ], "end": 1759651562536 } ], "warnings": [ { "message": "Backup fell back to a full" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:75dd9c34-63db-f101-c57f-b3c0455f9b21" }, "message": "Snapshot data has been deleted" } ], "end": 1759651562536 }, { "data": { "type": "VM", "id": "6750c30b-ce59-0d09-cbdb-f7136f793d10", "name_label": "Docker/Host - Internal" }, "id": "1759651206790", "message": "backup VM", "start": 1759651206790, "status": "success", "tasks": [ { "id": "1759651206878", "message": "clean-vm", "start": 1759651206878, "status": "success", "end": 1759651207059, "result": { "merge": false } }, { "id": "1759651207473:0", "message": "snapshot", "start": 1759651207473, "status": "success", "end": 1759651215912, "result": "64184769-fb72-2b12-3da0-b1b5470a6419" }, { "data": { "id": "fde89f48-d384-4208-8243-de5755ea7434", "isFull": false, "type": "remote" }, "id": "1759651215913", "message": "export", "start": 1759651215913, "status": "success", "tasks": [ { "id": "1759651219060", "message": "transfer", "start": 1759651219060, "status": "success", "end": 1759651494041, "result": { "size": 6427770880 } }, { "id": "1759651521940:0", "message": "health check", "start": 1759651521940, "status": "success", "tasks": [ { "id": "1759651523602", "message": "transfer", "start": 1759651523602, "status": "success", "end": 1759651609100, "result": { "size": 0, "id": "280aac5f-8b1e-c38e-4d61-2027641eebcc" } }, { "id": "1759651609101", "message": "vmstart", "start": 1759651609101, "status": "success", "end": 1759651612049 } ], "end": 1759651614305 }, { "id": "1759651614396", "message": "clean-vm", "start": 1759651614396, "status": "success", "warnings": [ { "data": { "path": "/xo-vm-backups/6750c30b-ce59-0d09-cbdb-f7136f793d10/20251005T080019Z.json", "actual": 6427770880, "expected": 6429383168 }, "message": "cleanVm: incorrect backup size in metadata" } ], "end": 1759651617142, "result": { "merge": false } } ], "end": 1759651617181 } ], "warnings": [ { "message": "Backup fell back to a full" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:940dbaf0-d954-bce0-a958-03f836759696" }, "message": "Snapshot data has been deleted" } ], "end": 1759651617181 }, { "data": { "type": "VM", "id": "16653035-869a-46fc-98c4-3a18f70ab38c", "name_label": "Xen Orchestra" }, "id": "1759651441167", "message": "backup VM", "start": 1759651441167, "status": "success", "tasks": [ { "id": "1759651441379", "message": "clean-vm", "start": 1759651441379, "status": "success", "end": 1759651442462, "result": { "merge": false } }, { "id": "1759651442738", "message": "snapshot", "start": 1759651442738, "status": "success", "end": 1759651444439, "result": "e6505f2e-3466-5967-e6b7-1673ab4db303" }, { "data": { "id": "fde89f48-d384-4208-8243-de5755ea7434", "isFull": false, "type": "remote" }, "id": "1759651444439:0", "message": "export", "start": 1759651444439, "status": "success", "tasks": [ { "id": "1759651446955", "message": "transfer", "start": 1759651446955, "status": "success", "end": 1759651789366, "result": { "size": 7417626624 } }, { "id": "1759651792212:0", "message": "health check", "start": 1759651792212, "status": "success", "tasks": [ { "id": "1759651792315", "message": "transfer", "start": 1759651792315, "status": "success", "end": 1759651884950, "result": { "size": 0, "id": "4dc9df52-0114-5a1a-2fa0-86387e2eefff" } }, { "id": "1759651884951", "message": "vmstart", "start": 1759651884951, "status": "success", "end": 1759651888100 } ], "end": 1759651890459 }, { "id": "1759651890561", "message": "clean-vm", "start": 1759651890561, "status": "success", "warnings": [ { "data": { "path": "/xo-vm-backups/16653035-869a-46fc-98c4-3a18f70ab38c/20251005T080406Z.json", "actual": 7417626624, "expected": 7419480576 }, "message": "cleanVm: incorrect backup size in metadata" } ], "end": 1759651905413, "result": { "merge": false } } ], "end": 1759651905551 } ], "warnings": [ { "message": "Backup fell back to a full" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:0c719039-ea3c-e018-add3-8a84c9ae003b" }, "message": "Snapshot data has been deleted" } ], "end": 1759651905551 }, { "data": { "type": "VM", "id": "4f932e56-9125-6512-955d-e5f6249c8c8b", "name_label": "Docker/Portainer - Internal" }, "id": "1759651617205", "message": "backup VM", "start": 1759651617205, "status": "success", "tasks": [ { "id": "1759651617568", "message": "clean-vm", "start": 1759651617568, "status": "success", "end": 1759651619005, "result": { "merge": false } }, { "id": "1759651619272", "message": "snapshot", "start": 1759651619272, "status": "success", "end": 1759651620992, "result": "2b88ceb6-da16-12f0-847e-7d983e1f7299" }, { "data": { "id": "fde89f48-d384-4208-8243-de5755ea7434", "isFull": false, "type": "remote" }, "id": "1759651620992:0", "message": "export", "start": 1759651620992, "status": "success", "tasks": [ { "id": "1759651623553", "message": "transfer", "start": 1759651623553, "status": "success", "end": 1759651886681, "result": { "size": 5857345536 } }, { "id": "1759651889014:0", "message": "health check", "start": 1759651889014, "status": "success", "tasks": [ { "id": "1759651889149", "message": "transfer", "start": 1759651889149, "status": "success", "end": 1759651960344, "result": { "size": 0, "id": "3d6c77dd-0662-1c42-6f98-f5ad3036e418" } }, { "id": "1759651960344:0", "message": "vmstart", "start": 1759651960344, "status": "success", "end": 1759651963364 } ], "end": 1759651965880 }, { "id": "1759651965983", "message": "clean-vm", "start": 1759651965983, "status": "success", "warnings": [ { "data": { "path": "/xo-vm-backups/4f932e56-9125-6512-955d-e5f6249c8c8b/20251005T080703Z.json", "actual": 5857345536, "expected": 5858818560 }, "message": "cleanVm: incorrect backup size in metadata" } ], "end": 1759651967921, "result": { "merge": false } } ], "end": 1759651967951 } ], "warnings": [ { "message": "Backup fell back to a full" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:a08c7415-b754-a97d-b0ba-c13a2e2117ec" }, "message": "Snapshot data has been deleted" } ], "end": 1759651967951 }, { "data": { "type": "VM", "id": "d3f07943-5779-5c75-9436-422b453ddd4c", "name_label": "Docker/Host - External" }, "id": "1759651562562", "message": "backup VM", "start": 1759651562562, "status": "success", "tasks": [ { "id": "1759651564305", "message": "clean-vm", "start": 1759651564305, "status": "success", "end": 1759651579194, "result": { "merge": false } }, { "id": "1759651580906", "message": "snapshot", "start": 1759651580906, "status": "success", "end": 1759651582598, "result": "1a16d72e-84ba-a635-7b11-6ff41fa6bb1a" }, { "data": { "id": "fde89f48-d384-4208-8243-de5755ea7434", "isFull": false, "type": "remote" }, "id": "1759651582598:0", "message": "export", "start": 1759651582598, "status": "success", "tasks": [ { "id": "1759651595900", "message": "transfer", "start": 1759651595900, "status": "success", "end": 1759651962775, "result": { "size": 8115978240 } }, { "id": "1759651970651:0", "message": "health check", "start": 1759651970651, "status": "success", "tasks": [ { "id": "1759651970777", "message": "transfer", "start": 1759651970777, "status": "success", "end": 1759652060873, "result": { "size": 0, "id": "a94697da-0178-4540-b619-d493137cd87e" } }, { "id": "1759652060874", "message": "vmstart", "start": 1759652060874, "status": "success", "end": 1759652063833 } ], "end": 1759652066091 }, { "id": "1759652066182", "message": "clean-vm", "start": 1759652066182, "status": "success", "warnings": [ { "data": { "path": "/xo-vm-backups/d3f07943-5779-5c75-9436-422b453ddd4c/20251005T080635Z.json", "actual": 8115978240, "expected": 8118002688 }, "message": "cleanVm: incorrect backup size in metadata" } ], "end": 1759652069227, "result": { "merge": false } } ], "end": 1759652069280 } ], "warnings": [ { "message": "Backup fell back to a full" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:ab410ff8-77d4-b549-3837-a87e932423e9" }, "message": "Snapshot data has been deleted" } ], "end": 1759652069280 }, { "data": { "type": "VM", "id": "fab1e47e-6b23-ac6e-2f6f-cadee708a13b", "name_label": "Docker/Nextcloud - External" }, "id": "1759651905562", "message": "backup VM", "start": 1759651905562, "status": "success", "tasks": [ { "id": "1759651906819", "message": "clean-vm", "start": 1759651906819, "status": "success", "end": 1759651922004, "result": { "merge": false } }, { "id": "1759651923623", "message": "snapshot", "start": 1759651923623, "status": "success", "end": 1759651925135, "result": "079a3129-dc62-3a24-cde5-5816576dbe50" }, { "data": { "id": "fde89f48-d384-4208-8243-de5755ea7434", "isFull": false, "type": "remote" }, "id": "1759651925136", "message": "export", "start": 1759651925136, "status": "success", "tasks": [ { "id": "1759651939259", "message": "transfer", "start": 1759651939259, "status": "success", "end": 1759652398143, "result": { "size": 20923285504 } }, { "id": "1759652400451", "message": "health check", "start": 1759652400451, "status": "success", "tasks": [ { "id": "1759652400580", "message": "transfer", "start": 1759652400580, "status": "success", "end": 1759652608594, "result": { "size": 0, "id": "6a1f30b6-c8fb-1c60-f5b0-c809099a1a6e" } }, { "id": "1759652608595", "message": "vmstart", "start": 1759652608595, "status": "success", "end": 1759652611594 } ], "end": 1759652614160 }, { "id": "1759652614248", "message": "clean-vm", "start": 1759652614248, "status": "success", "warnings": [ { "data": { "path": "/xo-vm-backups/fab1e47e-6b23-ac6e-2f6f-cadee708a13b/20251005T081219Z.json", "actual": 20923285504, "expected": 20928436736 }, "message": "cleanVm: incorrect backup size in metadata" } ], "end": 1759652616019, "result": { "merge": false } } ], "end": 1759652616061 } ], "warnings": [ { "message": "Backup fell back to a full" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:ed0c85b7-0bcc-e3bd-6a35-a401c6f091d2" }, "message": "Snapshot data has been deleted" } ], "end": 1759652616061 }, { "data": { "type": "VM", "id": "3e351bfb-d758-75c6-1a17-564e6560c537", "name_label": "Win11Pro1" }, "id": "1759651206786", "message": "backup VM", "start": 1759651206786, "status": "success", "tasks": [ { "id": "1759651206831", "message": "clean-vm", "start": 1759651206831, "status": "success", "end": 1759651207013, "result": { "merge": false } }, { "id": "1759651207473", "message": "snapshot", "start": 1759651207473, "status": "success", "end": 1759651209165, "result": "0048397c-9151-c83e-04d5-878955f8bc62" }, { "data": { "id": "fde89f48-d384-4208-8243-de5755ea7434", "isFull": false, "type": "remote" }, "id": "1759651209166", "message": "export", "start": 1759651209166, "status": "success", "tasks": [ { "id": "1759651214533", "message": "transfer", "start": 1759651214533, "status": "success", "end": 1759653069800, "result": { "size": 92809461760 } }, { "id": "1759653071177:0", "message": "health check", "start": 1759653071177, "status": "success", "tasks": [ { "id": "1759653071187", "message": "transfer", "start": 1759653071187, "status": "success", "end": 1759653899955, "result": { "size": 0, "id": "566c0b93-d3a0-b69c-351e-0d371f79c098" } }, { "id": "1759653899956", "message": "vmstart", "start": 1759653899956, "status": "success", "end": 1759653903489 } ], "end": 1759653906216 }, { "id": "1759653906330", "message": "clean-vm", "start": 1759653906330, "status": "success", "warnings": [ { "data": { "path": "/xo-vm-backups/3e351bfb-d758-75c6-1a17-564e6560c537/20251005T080014Z.json", "actual": 92809461760, "expected": 92832646656 }, "message": "cleanVm: incorrect backup size in metadata" } ], "end": 1759653906510, "result": { "merge": false } } ], "end": 1759653906511 } ], "warnings": [ { "message": "Backup fell back to a full" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:b974e97e-1b63-cb25-1ba1-01c5ef9d9977" }, "message": "Snapshot data has been deleted" } ], "end": 1759653906511 } ], "end": 1759653906511 } -
Edited your post to use the right Markdown syntax, otherwise it's a pain to read
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Just following up to see if anyone has any thoughts on a possible resolution?
-
Hey,
we also have the problem of delta backups falling back to full very often using latest XO from sources.
We are also using CBT.
I read in the documentation that "CBT snapshot data purge" feature can be hit or miss.
It would be awesome if that feature would be more stable though. I consider it "cleaner" to not have snapshots that can't be deleted.
Best regards -
Also having issue. Didnt see the issue until my Remote SR has ran out of free space.
{ "data": { "mode": "delta", "reportWhen": "always", "backupReportTpl": "compactMjml", "hideSuccessfulItems": true }, "id": "1762146000010", "jobId": "95ac8089-69f3-404e-b902-21d0e878eec2", "jobName": "Backup Job 1", "message": "backup", "scheduleId": "76989b41-8bcf-4438-833a-84ae80125367", "start": 1762146000010, "status": "success", "infos": [ { "data": { "vms": [ "b25a5709-f1f8-e942-f0cc-f443eb9b9cf3", "5e00a752-177e-33f1-c5f5-ade59826cdab", "836db883-fdca-7458-0308-f225bbecbc29", "ce624d33-8f9c-8587-771b-194a161bdfed", "bce2b7f4-d602-5cdf-b275-da9554be61d3", "e0a3093a-52fd-f8dc-1c39-075eeb9d0314", "f0a673d7-dfb7-5766-86be-6dab83ac264b" ] }, "message": "vms" } ], "tasks": [ { "data": { "type": "VM", "id": "5e00a752-177e-33f1-c5f5-ade59826cdab", "name_label": "XO" }, "id": "1762146003418:0", "message": "backup VM", "start": 1762146003418, "status": "success", "tasks": [ { "id": "1762146003424", "message": "clean-vm", "start": 1762146003424, "status": "success", "end": 1762146003569, "result": { "merge": false } }, { "id": "1762146003933", "message": "snapshot", "start": 1762146003933, "status": "success", "end": 1762146005573, "result": "f8159d5c-c1b3-e4b9-155f-70bc2d2a8325" }, { "data": { "id": "b86b4c88-79f9-4ce8-9fa4-dce78a32ea44", "isFull": false, "type": "remote" }, "id": "1762146005573:0", "message": "export", "start": 1762146005573, "status": "success", "tasks": [ { "id": "1762146009606", "message": "transfer", "start": 1762146009606, "status": "success", "end": 1762146316193, "result": { "size": 25839009792 } }, { "id": "1762146317322", "message": "health check", "start": 1762146317322, "status": "success", "tasks": [ { "id": "1762146317328", "message": "transfer", "start": 1762146317328, "status": "success", "end": 1762146462139, "result": { "size": 0, "id": "bf74ff0e-a2e4-deab-bd59-f51a8985fee3" } }, { "id": "1762146462139:0", "message": "vmstart", "start": 1762146462139, "status": "success", "end": 1762146470513 } ], "end": 1762146472941 }, { "id": 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size in metadata" } ], "end": 1762148558480, "result": { "merge": false } } ], "end": 1762148558481 } ], "warnings": [ { "message": "Backup fell back to a full" } ], "infos": [ { "message": "Transfer data using NBD" }, { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:f053e31e-284a-ae00-741c-eff4e9f97f01" }, "message": "Snapshot data has been deleted" } ], "end": 1762148558481 }, { "data": { "type": "VM", "id": "e0a3093a-52fd-f8dc-1c39-075eeb9d0314", "name_label": "Docker of Things" }, "id": "1762147876878", "message": "backup VM", "start": 1762147876878, "status": "success", "tasks": [ { "id": "1762147876884", "message": "clean-vm", "start": 1762147876884, "status": "success", "end": 1762147877204, "result": { "merge": false } }, { "id": "1762147877403", "message": "snapshot", "start": 1762147877403, "status": "success", "end": 1762147880513, "result": "2753d0e3-1cd5-c34c-2e5e-3c6dba85633d" }, { "data": { "id": "b86b4c88-79f9-4ce8-9fa4-dce78a32ea44", "isFull": false, "type": "remote" }, "id": "1762147880513:0", "message": "export", "start": 1762147880513, "status": "success", "tasks": [ { "id": "1762147884329", "message": "transfer", "start": 1762147884329, "status": "success", "end": 1762148429641, "result": { "size": 65131249664 } }, { "id": "1762148430966:0", "message": "health check", "start": 1762148430966, "status": "success", "tasks": [ { "id": "1762148430991", "message": "transfer", "start": 1762148430991, "status": "success", "end": 1762148812721, "result": { "size": 0, "id": "734681b1-e706-b96b-9efb-168acac01bb5" } }, { "id": "1762148812721:0", "message": "vmstart", "start": 1762148812721, "status": "success", "end": 1762148818820 } ], "end": 1762148820961 }, { "id": "1762148820974", "message": "clean-vm", "start": 1762148820974, "status": "success", "warnings": [ { "data": { "path": "/xo-vm-backups/e0a3093a-52fd-f8dc-1c39-075eeb9d0314/20251103T053124Z.json", "actual": 65131249664, "expected": 65147677184 }, "message": "cleanVm: incorrect backup size in metadata" } ], "end": 1762148821309, "result": { "merge": false } } ], "end": 1762148821310 } ], "warnings": [ { "message": "Backup fell back to a full" } ], "infos": [ { "message": "Transfer data using NBD" }, { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:68285439-7986-bd76-a88a-5da4a381d548" }, "message": "Snapshot data has been deleted" } ], "end": 1762148821310 } ], "end": 1762148821310 }
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as @MBNext stated disabling Purge snapshot data when using CBT worked for me.
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@florent turning off CBT removed the "fall back" message but my Delta backup is still doing full backups.
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