How to resolve ORA-02298 Error Message in Oracle database

Learn the motive and how to resolve the ORA-02298 error message in Oracle.

Description

When you come across an ORA-02298 error, the following error message will appear:

ORA-02298: cannot allow name – guardian keys now not found

Cause

You tried to execute an ALTER TABLE ENABLE CONSTRAINT command, but it failed because your desk has orphaned child documents in it.

Resolution

The option(s) to resolve this Oracle error are:

Option #1

Remove the orphaned toddler data from the infant desk (foreign key relationship), and then re-execute the ALTER TABLE ENABLE CONSTRAINT command.

Option #2

Create the lacking parent documents in the father or mother desk (foreign key relationship), and then re-execute the ALTER TABLE ENABLE CONSTRAINT command.

Learn more about foreign keys.