Adding column containing foreign key to existing table in production in Laravel

I have a table participant which has a many-to-one relationship with table campaign. Now for some stupid reason I forgot to add a column campaign_id, which holds the foreign key to the row in table campaign. Now to fix this I could easily add the following line to the create_participants_table migration file and run the php artisan migrate:fresh command, which will drop all tables and recreate them with the right columns.