Often, especially when migrating VMs back and forth (A -> B and then back to B -> A) during maintenance, my ZFS replication gets in a state where it fails with errors like:
"volume 'ssdtank/vmdata/vm-117-disk-0' already exists"
or claims target and source don't have a common ancestor version...
We have been using proxmox for over a few years, it went fine up until now.
There is a dell server on linux with about 8 VM's running on linux and windows. Proxmox 4.1-1
There was no recent changes in SW or HW.
Now all of the sudden random machines started to give this error: