BDoc error : In a 1:1 relation,you can have only one PARTNER_ID

Hi All,

We have more than 300 errors in Production system and BDoc type BUPA_MAIN, below are BDoc errors :

1.Partner **********( guid ): the following errors occured

message no:bupa_mw_exchange010

2. In a 1:1 relation,you can have only one PARTNER_ID **** (chines languges ) ****( Org Unit & Distru Divi no)
message no : AXT_RUNTIME_MESSAGE016

3.Validation error occured: Module CRM_BUPA_MAIN_VAL,BDoc type BUAP_MANI
message no : SMW3018

its looks like data issue and source system is ecc, kindly guide me how to stop the errors.

Jimmi