You are out-of-date again. Latest is 5.59.x, and there will likely be another release around EOM.
my pool have two nodes, but only master node have this problem!
You need to use XenOrchestra (XOA) or you use "yum update" from the xcp-ng host shell.
In any case, you need to find the large files in /var/log to see what's going on with that.
After reboot prolem with log solved. I keep watching..