# SQL error: foreign key constraint fails "Cannot add or update a child row: a foreign key constraint fails...."

This is a common issue with some QBCore installations. The way we set up job garages, we update the `citizenid` and set it to the name of the job. Some installations prevent this due to a database constraint. Fixing this issue is simple, just remove the constraint. Run the following SQL in your database: ```sql ALTER TABLE player_vehicles DROP FOREIGN KEY FK_playervehicles_players ``` Some databases might use another name than the "FK\_playervehicles\_players" so make sure you change it to the one showing in your error

In this example the foreign key name is `player_vehicles_ibfk_1` so the sql query will look like this: ```sql ALTER TABLE player_vehicles DROP FOREIGN KEY player_vehicles_ibfk_1 ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.jgscripts.com/advanced-garages/troubleshooting/sql-error-foreign-key-constraint-fails.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.