Cannot add or update a child row: a foreign key constraint fails
SET FOREIGN_KEY_CHECKS=0Cannot add or update a child row: a foreign key constraint fails
SET FOREIGN_KEY_CHECKS=0integrity constraint violation: 1452 cannot add or update a child row: a foreign key constraint fails
It just simply means that the value for column project_id on table comments you are inserting doesn't exist on table projects. Bear in mind that the values of column project_id on table comments is dependent on the values of ID on table Projects.
The value 50dc845a-83e4-4db3-8705-5432ae7aaee3 you are inserting for column project_id does not exist on table projects.mysql error 1452
SELECT child_table.*
FROM child_table
LEFT JOIN parent_table
ON parent_table.referenced_column = child_table.referencing_column
WHERE parent_table.referenced_column IS NULL
-- Delete all data from output of that queryCopyright © 2021 Codeinu
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