[PVE-User] Backup Error

[Pablo Portillo - BTW S.A.]

Hello,
 
My name's Paul and I'm pretty new with Proxmox.
 
This is my first post so if this has been published, I apologize...
 
 
The issue I have is related to the automatic backup task of one of my VM. It's been programmed to back it up with the Snapshot mode, but once it started, the following error appeared:
 
INFO: starting new backup job: vzdump 108 --quiet 1 --mailto pportillo at btwsa.com.ar --mode snapshot --compress gzip --storage backup --node pve1
INFO: Starting Backup of VM 108 (qemu)
INFO: status = running
INFO: backup mode: snapshot
INFO: ionice priority: 7
ERROR: Backup of VM 108 failed - Undefined subroutine &PVE::Storage::cluster_lock_storage called at /usr/share/perl5/PVE/VZDump/QemuServer.pm line 240.
INFO: Backup job finished with errors
TASK ERROR: job errors
 
 
Can someone please give me a hand or a clue of what to do with this error and fix it?
 
 
I'll wait for your answer.
Thank you very much.
Paul.
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