I tried to load dev build 694 on a 1.20.6 server without any other plugins. I get the error "Detected a newer version of ProtocolLib (694.0.0) in plugin folder than the current (5.2.1-SNAPSHOT)". The server is running Paper-133.

The log file is attached:
latest.log

i'm just going to change that check

looks like it doesn't have the intended effect when it's remapped by paper. interesting