Oracle® Database 11g / 12c / 18c error codes ORA-00402: database changes by release [string] cannot be used by release [string]

ORA-00402: database changes by release [string] cannot be used by release [string]

Oracle Error Code: ORA-00402

Cause: Changes have been made to the database that require a newer software release or that violate the compatibility parameters.

Action: Use a version of the software that can understand the changes or relax the compatibility requirements in the init file.