EV9 - An attempt was made to move an ArchiveFolder beneath itself

Dear all,

I have a mailbox which is not archiving since 3 month now. Each time i try to run the process manually i get the Event id 8390 with

"An attempt was made to move an ArchiveFolder beneath itself" error.

I did try to disable the mailbox or to ZAP it , none of them are working . EVPM is just hanging on the command and nothing is working , same with the disabling via the EV console , when i try to disable the mailbox the progress bar is blocked and make my MMC console crashed.

This is the first time something like this happens , all the rest is working quite fine.

Any ideas or help would be greatly apreciated !

Thank you in advance

Brice