What would some side-effects of deleting my player profile? If loss of my inventory is the only side-effect I'm good, because I spawn in the void when I login now. So, I now have no inventory to lose.

I was at a Blaze Spawner in /warp townfarm. I think I might have sat down in a chair inside the spawner.

When I try to join the server, I spawn at the hub, then transported to the main server. I fall for a second before being kicked for "Nope!". I read some similar problems, one saying to delete a player file. By doing this I will lose my inventory, and I want to avoid that. If there is any solution to this without losing my inventory, I would like to know.