Are you trying to set-up a foreign key constraint on one of your tables and you’re getting a 1452 error?
[Illuminate\Database\QueryException] SQLSTATE: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails
You might also get a General error: 1005
[PDOException] SQLSTATE[HY000]: General error: 1005 Can't create table `app`.`#sql-33d4_1a2` (errno: 150 "Foreign key constraint is incorrectly formed")
This is a MySql issue and not a Laravel one.