Issue while running VBOF

Hello Team,

I am facing the issue while running the transaction VBOF.  Getting the below message;

Document number xxxxxxx was already assigned.

But i verified the documents and it's not updated. Surprising thing here is while executing VBOF if i activated Test then i can able to view the old and new values on screen. Once i removed and try to execute in real time getting above message.

While checking the agreement getting the message as Agreement is not in current.

Can you guys please help...

Activated structures S060 and S136 to Synchronus updating 1.

Please help.

Thanks

SK