Type of bug

General issue

TabList version

5.7.7

Software version

Paper version 1.21.1-119-master@7cd4f2c

Relevant plugins

ArmorStandTools, Builders-Utilities, *ChatColor2, *ColoredSigns, CoreProtect, CrackShot, Essentials, EssentialsChat, FastAsyncWorldEdit, GSit, ImageMaps, LPC, LuckPerms, Multiverse-Core, Multiverse-Inventories, Multiverse-NetherPortals, PluginConstructorAPI, *Seen, TabList, ViaBackwards, ViaVersion

Console error (if applicable)

No response

TabList configuration files

https://paste.gg/p/anonymous/c4763c5850144af6a2753ec1e8b981b1

Bug description

Every time anyone logs onto my server with TabList enabled, they get a Network Protocol Error. This issue has only occurred since updating to 1.21.1 from 1.20. This also occurs on a completely fresh install of TabList. When I remove TabList altogether, the problem is fixed.

When checking the report, it says this:

Description: Packet handling error

java.lang.IllegalArgumentException: An objective with the name 'PingTab' already exists!
at eyg.a(SourceFile:51)
at fzg.a(SourceFile:1949)
at aff.a(SourceFile:71)
at aff.a(SourceFile:17)
at zj.a(SourceFile:27)
at bph.d(SourceFile:162)
at bpl.d(SourceFile:23)
at bph.B(SourceFile:136)
at bph.bB(SourceFile:121)
at fgo.c(SourceFile:1240)
at fgo.f(SourceFile:882)
at net.minecraft.client.main.Main.main(SourceFile:256)

Not sure how to fix this, any help is appreciated! Thanks.