I can't join any servers on minecraft when I just changed my username

I downloaded and re-downloaded, logged back in and out multiple times, I just changed my username, I lost all of my data expect my skins, someone help me please, how do I get back my servers and worlds

2 Answers

Make sure you changed your username instead of switching/creating a new Minecraft account. Try the button on the bottom of the create new world menu (titled sync old worlds.) Otherwise, this is probably a glitch that you might want to report.

According to this question, some servers might cause you to lose your progress after changing your username (it might be dependent on the mods installed on that server, of which some don't use a player's UUID but their username).

It's probably best, based on this Reddit post, to

• ask the server admins to transfer your items from your old username to your current one, or
• download your old files and upload them again after having changed the ownership's UUID - which you can find here - from your old to your new one.
• You can also authorize a friend on the server temporary ownership and ask them to gather your items and gift them to you.