[MC-191744] Message about customized worlds support keeps appearing upon load

I have a map I've been working on for 5 or 6 years that I've been updating to the latest version of Minecraft as those versions have been released along the years. In the past, I've gotten the message stating "Customized worlds are no longer supported." Last time I recalled it happening, I just clicked any button to continue and didn't worry about it. The message never came up again. But since the 1.16 update (and now 1.16.1) this message keeps popping up every time I try to load the map. I don't know why this is happening. I've tried the Optimize World option but that didn't make a difference.

Attachments

output.log

Comments 2

TheZaius 2020-07-08T10:47:35Z

Works as intended? Once the save has been opened in 1.16, what's the point in having Minecraft constantly remind me about custom worlds and then prompting me to save a backup? Why isn't one notification for the save file sufficient?

Fritz Meyer 2021-07-31T15:10:15Z

I agree this is annoying and might even desensitize you to actual warnings, like those before updating. But I guess Mojang won't fix this.

To fix it yourself, download NBT Explorer, then navigate to "worldname -> level.dat -> legacy_custom_options" and delete that entry.