On an offline-mode server, the plugin stores online-mode UUIDs for some players in its data.

[AisakaUwU]

Describe the bug
In offline mode, Residence stores online-mode UUIDs for some players, causing /res pset to fail because permissions are tied to the wrong UUID.

This issue only occurs with certain players. Since the plugin saves the player's online-mode UUID in its data, but the server is running in offline mode, commands like /res pset do not work for those players — permissions are assigned to their online-mode UUID instead of the offline-mode one.

I noticed that there have been some updates regarding OfflineMode in Residence. How can I fix this issue?

Expected behavior
Offline-mode servers should always use offline-mode UUIDs, not online-mode UUIDs.

Server version:

[20:20:30 INFO]: --------------------------------------------------
[20:20:30 INFO]: Residence version: 6.0.1.4
[20:20:30 INFO]: CMILib version: 1.5.8.6
[20:20:30 INFO]: Server version: Leaf(39)
[20:20:30 INFO]: Java version: 24.0.1
[20:20:30 INFO]: --------------------------------------------------

[Zrips]

UUID recorded based on what server itself identifies it to be for that user, and as of 6.x version entire residence recognition is based on UUID's and not player name, as it was before if you had offline mode enabled. If you converted from old version to new one, there might have been some issues during conversion. Some player data gets converted and recorded to associate name with UUID on first launch, which is taken based on residence owners UUID and known last name, and if you had previously offline mode running it could have incorrectly linked both.
Offline mode option was removed due to it causing more issues than it solved, which you are currently encountered.
Potential fix at the moment would be to manually update incorrect UUID set for residence owner.
Would be interesting to see residence record inside save file, user file records and what is the actual players offline and online UUID's

[AisakaUwU]

UUID recorded based on what server itself identifies it to be for that user, and as of 6.x version entire residence recognition is based on UUID's and not player name, as it was before if you had offline mode enabled. If you converted from old version to new one, there might have been some issues during conversion. Some player data gets converted and recorded to associate name with UUID on first launch, which is taken based on residence owners UUID and known last name, and if you had previously offline mode running it could have incorrectly linked both. Offline mode option was removed due to it causing more issues than it solved, which you are currently encountered. Potential fix at the moment would be to manually update incorrect UUID set for residence owner. Would be interesting to see residence record inside save file, user file records and what is the actual players offline and online UUID's

Yes, I can provide more information:

1. My server has always been running in offline mode.

2. I did upgrade from an older version to the current one (minecraft version and plugin version).

3. I have never enabled the "Offline mode" option in the Residence configuration.

4. This issue seems to only affect older players; new players joining the server do not experience this problem.

5. Here is information about a player experiencing this issue:

Player name: windwish_

His UUID on my server (offline UUID) is:
✅d7ba6c54-681f-332f-8712-0bd7b16c1573

His online UUID (queried from namemc) is:
❌e547782d-8e43-4dea-89d6-1799a7e4e56b

In the file \plugins\Residence\Save\Worlds\res_world.yml:

Both his offline UUID and online UUID can be found. The offline UUID appears most frequently, while the online UUID appears less often.

Now, when I use the command /res padd windwish_ to add permissions for this player, res_world.yml only records his online UUID, which is ❌e547782d-8e43-4dea-89d6-1799a7e4e56b, instead of ✅d7ba6c54-681f-332f-8712-0bd7b16c1573.

Additionally, in the \world\playerdata folder:
I can find both DAT files: d7ba6c54-681f-332f-8712-0bd7b16c1573 and e547782d-8e43-4dea-89d6-1799a7e4e56b.
I'm not sure if this is related.

If I manually change all online UUIDs to offline UUIDs, will this correctly resolve the issue? Under what conditions would res use a player's online UUID on an offline server?