-25451: Integrity violation (SQL_Error) 

Explanation:

You executed a command (IMPORT) to import data in the PAGE format.The data violates the constraints of the catalog description of the database table.

User Response:

Adapt the data that has to be imported to the constraint of the catalog description belonging to the database table, or adapt the constraint of the catalog description belonging to the database table to the data that has to be imported.Then re-execute the command.