.COMException (0x80040001): Existe déjà. (The provided list of 3 items for object type 487 contains at least one duplicate item.)

Hi everybody

Has someone already have this error

Extension method failed. VaultTransactionController.OnNewTransactionSystem.Runtime.InteropServices.COMException (0x80040001): Existe déjà. (The provided list of 3 items for object type 487 contains at least one duplicate item.)

how to know the object number who have this trouble ?

many thanks
regards

Emmanuel