[HELP] Need to disable specific TEAMIDS from being joinable

[Regen]

Hey my server has been having issues where certain npcs like zombies cannot damage people in 1-4 teams ( same issue as this except robotboys fix does not work and breaks half the gamemode https://github.com/Facepunch/garrysmod-issues/issues/1820) my gamemode is basewars, just wondering if there is a way i can set teamids 1-4 to be NONJOINABLE or useable in any form or shape; i've already managed to set the default team to 5 so people without a faction can be damaged but i guess the first 4 factions will not be able to so i was wondering if anyone could help me out here

[Regen]

Small update, after making 4 factions on server start; the rest after are damangeable, tried using team.setup to make teams automatically and for some reason didn't do the trick