Bug Report

Type /ver NametagEdit and post the output.
4.5.0

What version of Bukkit/Spigot/PaperSpigot are you using? Type /ver
1.17.1

What plugins are you using? Type /plugins
Not related to plugins.

Please explain your issue. How do you trigger it?
Commands do not update mysql. When editing a group or player, their properties are not modified in mysql. MySQL has default data from original conversion. Example: use /nte group prefix - Watch the db not change.

Are there any errors in the console? Please use: https://pastebin.com
No errors, db is just not updated / saved.