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With composer you should be keeping your composer.lock file in your version control. If you upgrade and things don't work out then just revert your composer.lock and composer.json files, delete the entire vendor directory and run composer install and it will re-install whatever versions you previously had specified in the lock file. Googling your foreign key error seems to indicate a likely cause is column type mis-match. Maybe one of those updates changed the type of a column from int to bigint or similar. You'll need to check your different constraints to verify they match.