How to fix this?

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1

how to fix this output error?

Parameter 1 must be BasePart in SetPartCollisionGroup. 

function mob.Spawn(name, quantity, map)
	wait(1)
	local mobExists = serverstorage.Mob:FindFirstChild(name)
	
	if mobExists then
		for i=1, quantity do
			local newmob = mobExists:Clone()
			newmob.Parent = map.Mob
			newmob.HumanoidRootPart.CFrame = workspace.GrassLand.Spawn.CFrame
			
			for i, object in ipairs(newmob:GetDescendants()) do
				if object:IsA("BasePart") then
					PhysicsService:SetPartCollisionGroup(newmob, "Mob")
				end
			end
			
			coroutine.wrap(mob.Move)(newmob, map)	
			
			task.wait(1)
		end
	else
		warn("Requested Mob Is Not Inside The Mob", name) 
	end
end

image

2

You’re on the right track iterating its descendants, but you’re referencing “newmob” (the model) each time you call SetPartCollisionGroup. Change the the call to PhysicsService:SetPartCollisionGroup(object, "Mob")