https://userapps.support.sap.com/sap/support/knowledge/en/2527005
2527005 - BP ##1 exists in table BUT000 | SAP Knowledge Base Article
Unable to create a BP
sap knowledgebpexists
https://userapps.support.sap.com/sap/support/knowledge/en/2063732
2063732 - Not all BUT000 fields are available in the Account Search | SAP Knowledge Base Article
You wish to search accounts via a specific BUT000 field but it is not an available search cirteria