NPC & Players are colliding and Physics Service isn't working

Help and Feedback Scripting Support
#1

I simply want the NPC’s to stop colliding with the players. I tried printing to check if the code is running and everything was fine and I also tried searching everywhere on the internet but nothing work. (no errors in the output)

code:

--// Physics

PhysicsService:CreateCollisionGroup("NPC")
PhysicsService:CreateCollisionGroup("PlayerParts")

PhysicsService:CollisionGroupSetCollidable("PlayerParts","NPC",false)

game.Players.PlayerAdded:Connect(function(plr)

	plr.CharacterAdded:Connect(function(char)

		repeat wait() until char and #char:GetChildren() >= 16 or #char:GetChildren() >= 8

		for i,v in pairs(char:GetChildren()) do

			if v:IsA("BasePart") then

				PhysicsService:SetPartCollisionGroup(v,"PlayerParts")
			end
		end
	end)
end)

for i,v in pairs(game.Workspace:WaitForChild("Store").NPCs:GetChildren()) do
	
	if v:IsA("Model") then

		for _,part in pairs(v:GetChildren()) do

			if part:IsA("BasePart") then
				
				PhysicsService:SetPartCollisionGroup(part,"NPC")	
			end
		end
	end
end
#2

You should read this : PhysicsService | Roblox Creator Documentation

And this : Instance | Roblox Creator Documentation

ITS useful

#3

I read them but how would they help me?