ERROR 1452: Cannot add or update a child row: a foreign key constraint fails
MySQL supports foreign keys, which permit cross-referencing related data across tables, and foreign key constraints, which help keep the related data consistent.
A foreign key relationship involves a parent table that holds the initial column values, and a child table with column values that reference the parent column values. A foreign key constraint is defined on the child table.
Execute one of these lines before running your query, then you can run your query successfully. 🙂
1) For Session (recommended)
SET GLOBAL FOREIGN_KEY_CHECKS=0;