Type of bug

Data loss, Error in console

/ess dump * output

https://essentialsx.net/dump.html?id=399fe2c9132f46879a96929e063e8402

Error log (if applicable)

https://pastebin.com/wqAwENnQ

Bug description

hi
i use geyser for pocket edition players
some times a player have java user that called Mrunkown and join the server and play
after a while
the same player will create a pocket edition user with same name Mrunkown and join the server thinking that the uuidis is same and everything should be fine but it's not
after that essentials go look for the user and found 1 user with 2 uuidis and drop the error

Steps to reproduce

you need a pocket edition user
then you need to setup a server (essentials,vault,...etc) and install geyser mc on your server
then join the server with pocket edition
after that join the server with java user but as the same user that pocket edition have
then close restart the server and the error will be popped when the server is booted

Expected behaviour

just don't pop the error every time.
i don't know it's possible to fix this because user have data

Actual behaviour

it's pop the error when the server boots up or player joins

#3956 (comment)