our backup server is leaving snapshot files in virtual machines.

through edit settings > i can see VMs are on snapshot files like this (/VM-Name-000002.vmdk ) but snapshot manager dont show any snapshot.

consolidation message appears but when i do i fails.

In backup logs i can see these messages

CVMWareInfo::_RemoveVMSnapshot() - Failed to consolidate VM [VM-NAME] Guid [5023f0d3-c578-9e78-503d-a9c1af302XXX], attempt [0]

CVMWareInfo::_RemoveVMSnapshot() - Consolidating VM disks for VM [VM-NAME] Guid [5023f0d3-c578-9e78-503d-a9c1af302XXX]

if i perform storage vmotion then it solve the problem but is there any permanent solution.I have seen tons of posts but none have a solid solution.