In this post, you’ll learn more about the MariaDB Error 1821 ER_FK_NO_INDEX_CHILD with the details of the error message and why you receive this error
Maria DB Error Description
MariaDB Error 1821 – ER_FK_NO_INDEX_CHILD with the sqlState HY000
Error Description for the MariaDB Error ER_FK_NO_INDEX_CHILD
Failed to add the foreign key constaint. Missing index for constraint ‘%s’ in the foreign table ‘%s’