Serial Number management In sub-contracting

Dear Experts,

A material is sent to subcontractor which is having a serial number. When I receive the material back from Subcontractor, I need to enter same serial number while posting GR. (Using 101 movement type) Unfortunately, system does not allow me to post the GR with same serial number and shows the error msg as " This serial number cannot be entered".(For +543 Movement Type)

Looking forward for your kind help.

Thanks and Regards,

Prasanna.