https://userapps.support.sap.com/sap/support/knowledge/en/2685846
2685846 - Error 10303 "message too long" while trying to drop an index in a SQLScript database -...
Error 10303 while trying to drop an index that doesn't exist Example: Msg 10303, Level 16, State 4: Line 1: Message too long. Length = 1226974048.