I’m not sure to understand the state of your installation right now, but do you have a working environment on stage, with the version 8? - YES
Did you manually rollback to v6? - NO
Ok, then to deploy production, you need to copy/paste the schema from staging (assuming you have the same structure on both), because it won’t be automatically generated.
If your code is correctly migrated, it should work on production too.
We do deployment through Gitlab CI/CD into AWS kubernetics. Any idea how will my schema will be updated on production?
I suppose that you have to commit it on git in your case