Oracle error 14402 : ORA-14402: updating partition KEY COLUMN would cause a partition CHANGE

The above error was caused because when you updated the record, it now belongs to a different partition but since row movement between partitions is not enabled on the table, you got that error.

It's easy to solve this problem. Just enable row movement on the table by executing the following command. You need to be logged in as the owner schema of that table or have enough privileges to do so.

ALTER TABLE enable row movement;