Did you run the migration and migration with --force before and after you updated?
If you get stuck restore from a backup and run these steps through slowly. If your database migration fails your Mautic install will do very unexpected things like run into random and weird errors. So it’s crucial that the migration succeeds before you call the upgrade good.
If you use the mautic:update:find , mautic:update:apply and mautic:update:apply --finish there is no need to manually run the schema update. @Yosu_Cadilla is no doubt an expert and I don’t speak for him, but I believe that post is most relevant when updating from Mautic 2.x to Mautic 3.x not necessarily from Mautic 3.x to 3.x. Hopefully he will chime in and clarify.