(mappors) Player registered twice with different NPC instances

[visual lintel]

Setting up a new gamemode on our server. But this error keeps appearing. Removing all npc's and creating a few new ones doesn't fix the problem. In fact, the only 4 npc's on the server right now have been created in-game today and have not been modified.
https://paste.denizenscript.com/View/136391

[burnt elk]

(mappors) Player registered twice with different NPC instances

[burnt elk]

Hi I'm AutoThreadBot! Don't mind me, I'll just be adding the helper team to this thread so they can see it. A human will get to you soon.

[rich laurel]

!logcheck https://paste.denizenscript.com/View/136391

[warm kindle]

Log Check Results

Server Version

Paper version 1.21.8-56-main@65641d1 (2025-08-29T20:44:17Z)

Plugin Version(s)

Citizens v2.0.39-SNAPSHOT (build 3921) -- (:warning:Outdated build, behind by 32)

Checked For

@rich laurel

Online/Offline

Offline, but proxied.

UUID Version

4 (:white_check_mark: Online)

Other Noteworthy Plugin(s)

WorldGuard v7.0.14+2339-43997ec

Possibly Relevant Plugin(s)

TAB v5.2.5 - This plugin adds Below_Name scoreboards to NPCs.
ViaVersion v5.4.2 - Mixed client vs server versions can sometimes cause packet-related issues.
HeadDatabase v4.21.1 - HeadDatabase has been known to cause issues with skins.
CMI v9.8.1.2 - CMI tends to mess with a large variety of server features and often gets in the way of issue debugging.

Potentially Bad Line(s)

Starting Minecraft server on 0.0.0.0:25581 - server is offline but has no address bind. This might mean you're using a system level firewall, but if not, it means your proxy is bypassable by hackers. Either enable a system level firewall, or bind your server to localhost in server.properties via server-ip=127.0.0.1.
[22:59:00] [Server thread/ERROR]: [UltimateMenus] Invalid Configuration! '/home/amp/.ampdata/instances/Prison01/Minecraft/plugins/UltimateMenus/menus/warps menu.yml' has an invalid configuration. :warning: Log contains error messages.

[rich laurel]

Update Paper 1.21.8 to the latest build, and Citizens to the build linked here, and see if the issue still occurs https://ci.citizensnpcs.co/job/Citizens2/3948/

!update paper

[warm kindle]

Update Paper

Paper is a higher-performance alternative to Spigot that is 100% compatible with the equivalent Spigot version. It's much easier to update than Spigot itself, and carries a lot of performance and quality-of-life benefits.

Latest Paper builds are at https://papermc.io/downloads/paper.

(If you would prefer to use a Spigot build, refer to !update spigot).

[visual lintel]

I'm on it! Will report back to you after updating.

[turbid escarp]

This also happens if you reload citizens, which is not recommended to do.

[visual lintel]

Yes, I've noticed that. But what does that mean in practice? Should I never reload the Citizens plugin? Or should I just ignore the error messages after manually reloading??

[turbid escarp]

You shouldn't reload plugins unless they specifically tell you.

Generally, theres no reason to reload citizens.

There are rare cases.

[visual lintel]

Okay, then I just won't reload the plugin manually.

[visual lintel]

Updating both the plugin and paper didn't solve the issue, by the way.

[turbid escarp]

The error happens because you reloaded citizens.

Why are you reloading the plugin?

[visual lintel]

Because I'm editing the yml files

Still, it seems strange to me that there's a command in the plugin that you should not use, and produces errors.
I understand that this is the case, at the moment. But that might be something that needs to be looked into by a dev.

[turbid escarp]

Fullwall is aware of it and will not fix it due to the reload command needing to be sparingly used.

Why are you editing the yml files?

Actually, what yml files are you editing?

[visual lintel]

Alright, as long as he's aware of it, and I can just work around it this way, it's fine for me! I can just imagine it will confuse other users in the future.

[turbid escarp]

That makes sense, but I must ask what files you're editing specifically and for what purpose?

[visual lintel]

Because we're re-doing a gamemode that we stopped doing a few years ago. We want to reuse some settings and npc's from that old file, and that saves file is a mess. So we're just cleaning up the list of npc's.

That's mainly it

So in short, the config and saves yml.

[turbid escarp]

Hmm.

Rare @bitter karma ping, I recall reloading is usually not recommended but how come there isn't optional arguments for reloading configs/saves/etc? Denizen allows this.

[bitter karma]

I don't really see the benefit and nobody has ever asked to reload it separately

[fading hemlock]

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@visual lintel