ORA-31625: Schema string is needed to import

admin

ORA-31625: Schema string is needed to import this object, but is unaccessible
Cause: An error occurredwhen attempting to import objects. The schema
specified is needed to import this object, but access to this schema is notavailable.
Action: Refer to anyfollowing error messages for possible actions. Correct the
error, if possible, and try the operation again. If the error occurs again,contact
Oracle Customer Support and report the error.