Not necessarily, no. We aim to preserve users, communities and posts/comments. Image uploads might get lost though.

Such an in-place migration will need extensive database operations and likely some support by the Piefed developer (to add support for bcrypt hashed passwords), but we are hopeful to make it happen and maybe this will result in a database migration script other Lemmy instances could also use.

If this turns out to be infeasible, we will stay with Lemmy rather than reset everything.