MySQL Help Can't delete row (errno: 150) foreign key constraint?

The foreign key is on the plan table so you would want to drop it form there : ALTER TABLE `plans` DROP FOREIGN KEY `FK_plans` But be aware that this key (and the fact that it's stopping you) might be a desirable thing. The reason it is there is to prevent options from getting into the plan_options table which aren't associated with a plan. As such, you might want to delete from both tables when deleting: DELETE FROM plans, plan_options WHERE plan_id =?

The foreign key is on the plan table, so you would want to drop it form there: ALTER TABLE `plans` DROP FOREIGN KEY `FK_plans` But be aware that this key (and the fact that it's stopping you) might be a desirable thing. The reason it is there is to prevent options from getting into the plan_options table which aren't associated with a plan. As such, you might want to delete from both tables when deleting: DELETE FROM plans, plan_options WHERE plan_id =?

The foreign key is on the plan table so you would want to drop it form there.

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