Business Partner Update Error

Hi Experts,

We have a scenario which updates an Business Partner through Synchronous Update Method. While trying to update , The B1if throws an Error,

“XCE001 Nested exception: java.lang.RuntimeException: DI Error: (-10) 1320000140 - Business partner code 'RJM12212' already assigned to a business partner; enter a unique business partner code”.

To our understanding the error seems to be occur only when the DI Object call is of type “Synchronous Insert”. But the error triggered here raised from the “Synchronous Update” type of method.

Although we does not have “Synchronous Insert” of  Business Partner atom in our scenario, we wonder how this happens?.

Suggestions highly appreciated.

Thanks & Regards,

Karthik Kannan