Question

I’m running a trim query to remove any rows with a trailing “-” in the slug column.

I have rows with duplicates but that is required right now.

How can I fix the error so that it runs the trim query?

UPDATE terms
SET slug = TRIM(TRAILING '-' FROM slug);

The error: #1062 - Duplicate entry 'system' for key 'slug'

Answer 1

If you have a UNIQUE constraint set on the slug column, you must remove that:

ALTER TABLE terms DROP INDEX my_unique_constraint

Please note that the above will work only for MySQL – the statement varies as per the database.