Identity Manager

Object <Business Role> cannot be deleted while objects of type <Business Roles> are still assigned.

Hello,

We are having some issue to delete a Business role.
In fact, we get the following message error :

Error: [810008] Could not save object XXXX.
[810043] Object <XXXX> cannot be deleted while objects of type <Business Roles> are still assigned.

   at VI.DialogEngine.DialogEngine.DeleteDocument(IDocument[] documents, Schedule schedule)
   at VI.MVC.Document.Delete()
   at VI.MVC.SingleDBObjectDocument.OnDelete()
   at VI.DB.Implementation.SingleDbObject.Save()
   ---- Start of Inner Exception ----
   at VI.DB.Implementation.SingleDbObject.Save()
   at VI.DB.Implementation.SingleDbObject._RIDeleteCheck()

We already have checked the table PersonWantsOrg, PersonInOrg and PersonInBaseTree but didn't see any reference to this object.

What other dependencies do we need to look at? 
Do you know a way to overcome this ?
How can I raise the log message in order to have more information ?

Thanking you in advance,

Best Regards,

Grevelinger Mike.