We detected a symmetric key which uses a not supported encryption algorithm. Repeated use of the same RC4 or RC4_128 KEY_GUID ...

We detected a symmetric key which uses a not supported encryption algorithm. Repeated use of the same RC4 or RC4_128 KEY_GUID on different blocks of data will result in the same RC4 key because SQL Server does not provide a salt automatically. Using the same RC4 key repeatedly is a well-known error that will result in very weak encryption. Therefore, the RC4 and RC4_128 keywords are not supported in database compatibility Level 110 onwards.