https://userapps.support.sap.com/sap/support/knowledge/en/2638375
2638375 - R11653 from function BUPA_ROLE_ADD_2 | SAP Knowledge Base Article
You are seeing the error R11 653 (BP role XXXX already exists for partner XXXX) in the function module BUPA_ROLE_ADD_2 but only for specific roles