https://userapps.support.sap.com/sap/support/knowledge/en/2178099
2178099 - ERKRS/CE4KEY fields missing from COEP/ COEJ/ CECOEP/ CECOEJ | SAP Knowledge Base Article
-During a client copy (or extension of CI_COBL structure or upgrade) there are errors on COEP, COEJ, CECOEP or CECOEJ indicating that the tables are...