Lua Error, yellow name tags HELP ME lagging server!

[birdnest]

A player joined and everything was fine, then there name tags turned yellow idk what happened but it sent a bunch of lua errors

There is 1 Lua problem!
Please check your console for more information!
[ERROR] A runtime error has occurred in "gamemodes/policerp/gamemode/modules/base/sh_createitems.lua" on line 387.
The best help I can give you is this:

There is a player with an invalid team!

The player's name is Briggz, their team number is "1001", which has the name "Unassigned"

Hints:
- It is the server owner's responsibility to figure out why that player has no valid team.
- This error is very likely to be caused by an earlier error. If you don't see any errors in your own console, look at the server console.

The responsibility for the error above lies with (the authors of) one (or more) of these files:
1. gamemodes/policerp/gamemode/modules/base/sh_createitems.lua on line 387
2. gamemodes/policerp/gamemode/modules/base/sv_gamemode_functions.lua on line 752
3. function 'Spawn'
4. gamemodes/base/gamemode/player.lua on line 115
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