oracle error- ORA-00402: database changes by release string cannot be used by release string

Oracle error

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

oracle error- ORA-00401: the value for parameter string is not supported by this release

Oracle error

ORA-00401:	the value for parameter string is not supported by this release
Cause:	The value specified cannot be supported by this release of the software.
Action:	Choose an appropriate value, or remove the parameter value to use the default value.

oracle error- ORA-00400: invalid release value string for parameter string

Oracle error

ORA-00400:	invalid release value string for parameter string
Cause:	The release level given for the specified init parameter is invalid.
Action:	Correct the parameter value in the parameter file and retry.