[mysql] ERROR 1452: Cannot add or update a child row: a foreign key constraint fails

I know this thread is long already but when I ran a laravel seeding for category tables it created some strange ids which were 1, 11, 21, 31 which caused me error as I tried to reference it in another another table using ids like 1, 2, 3 ... the whole day until I checked the database up manually,

So sometimes go look up the database table to ensure the foreign data actually exist properly.

Cheers

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ERROR 1452: Cannot add or update a child row: a foreign key constraint fails MySQL - Cannot add or update a child row: a foreign key constraint fails Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails