My support case number 01829880
Several of my backup copy jobs fails with error, "Failed to merge full backup file Error: There is an item with the specified name and another type."
After sending log files to support I got some SQL script to run to correct this as this is a known issue, said and done, I did run the scripts and restarted the failing backup copy jobs, some of them worked after the "quick fix" but some didn't.
I was, after some more investigation asked if I was using per-VM mode for the jobs that was not cured with the "quick fix" and yes they do, but so does also the jobs that was fixed with the "quick fix". After some days one of the working jobs stopped working and was failing again with "Failed to merge full backup file Error: There is an item with the specified name and another type." again, one job is still working.
So I was told "Senior engineers are currently working on fix but we don't have an estimated time for it. A general recommendation for such cases is currently starting the new chain for the affected job.", it turns out that this known issue at this time don't have a persistent fix for per-VM job, bummer. But at this moment there is noting else to do than start a new chain and wish the jobs will behave throughout the summer.