Unlocking the MySQL Self-Referencing FK Trap: Why Does ON UPDATE CASCADE Fail?

Encountering Error 1451 when batch updating a table with a self-referencing foreign key in MySQL, even with `ON UPDATE CASCADE` set? This common scenario puzzles many developers. This article dives into the root cause—a classic 'deadlock' dilemma the database faces with batch updates and self-referencing dependencies. We provide two practical solutions, including the recommended method from wiki.lib00.com of temporarily disabling foreign key checks, to help you navigate this tricky database challenge.