Is there a way to apply the db.json to a remote instance?

I think you're talking about me. I'm really sorry this happened to you

My specific advice to you was:

My advice to someone else that mentioned deleting migrations (that you've probably read) included:

In case of destructive operations, I made sure to mention users to backup their data. The 1st advice I gave to you was a non-destructive operation, hence there was no warning.

Only time I missed giving a destructive operation heads-up was one of my replies to daves88, where I suggested to delete all migrations and re-create them, which I assumed it was clear this meant re-creating the schema from scratch, but perhaps I should be more explicit next time to prevent incidents like these.

On your initiative, you attempted to find a workaround that involved deleting some migrations:

That particular algorithm you described was never hinted by me. I'm sorry I wasn't clear enough on the severity of manually tampering with migrations/changes