Deleting a user account from DeltaV system v12.3.1

Hi Colleagues,

I am not able to delete a DeltaV database account. This user has all items checked in. I have rerun search for any items checked out by this user several times. I do not find any. I get error shown in following diagram. I have logged in as Domain and DeltaV administrator in DeltaV ProPlus server. I have tried enabling window and DeltaV account again, downloading set up data, and then deleting. This approach did not work either. If anyone has encountered this issue and resolved the issue, please share.

Thanks

Jaimin