https://userapps.support.sap.com/sap/support/knowledge/en/3674450
3674450 - Missing entry in DB table USOBHASH | SAP Knowledge Base Article
A Web Service is currently not visible in obj S_SERVICE when define a role via PFCG, as there is no hash key is being generated in the USOBHASH table.
sap knowledgemissingentrydb