Custom teams error

[jenson200]

Sup community, if been working on a command so that people can create their own team in game, although i can't get it quite right. currently struggling on this error (btw im a noob ) anyone knows how to fix it

[ERROR] gamemodes/basewars/gamemode/init.lua:230: attempt to perform arithmetic on local 'number' (a table value)
  1. unknown - gamemodes/basewars/gamemode/init.lua:230
   2. unknown - lua/includes/modules/concommand.lua:54

function CreateNewTeam(ply)
print("test");
local number = team.GetAllTeams()
local teamname = (ply:GetNWInt("Teamname"))
team.SetUp(number + 1,teamname,Color(255,255,255,255)) << 230 line
end

[SweptThrone]

team.GetAllTeams() returns a table, not a number. You're trying to add 1 to a table of teams.
Use #team.GetAllTeams() to get the size of the table.