Cannot delete Legacy Backup Job after upgrade

[cdubus]

Hello, before post i have cheched the https://www.veeam.com/kb4429 for this error :

Legacy Backup Copy job targeting a cloud repository start failing with the following error if the previous processing interval was interrupted:

Sequence contains more than one element

But in my case, i can't delete to Backup Copy Legacy Jobs targeted a local repository located on Quantum DXi 4700 with 3.x firmware. (I have applied this KB : https://www.veeam.com/kb4429 for Quantum).
All other (11) jobs can be deleted without issue, but 2 last it's impossible with message :

Sequence contains more than one element

Note : VBR version 12.0.0.1420 P20230718

[Dima P.]

Hello cdubus,

Thank you for your post, unfortunately this behavior is totally unexpected and unknown - please continue to work with our support team and let us know how the investigation goes!

[cdubus]

Ticket number #07051281

#Edit by Mod: Replaced contract number with case number

[cdubus]

Solved with support !

Go to Backup-Disk(Copy) -> “Detach Job”
Go to Job-Backup Copy -> Delete the BCJ.