Restrict multiples of the same item

[Upsidedownface]

Hello, i want to ban duplicate items in my map so that a player cannot acquire 2 of the same item on one hero. So far i have something like this

• Actions
  • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
    • If - Conditions
      • (Item-type of (Item being manipulated)) Not equal to (Item-type of (Item carried by (Hero manipulating item) in slot 1))
      • (Item-type of (Item being manipulated)) Not equal to (Item-type of (Item carried by (Hero manipulating item) in slot 2))
      • (Item-type of (Item being manipulated)) Not equal to (Item-type of (Item carried by (Hero manipulating item) in slot 3))
      • (Item-type of (Item being manipulated)) Not equal to (Item-type of (Item carried by (Hero manipulating item) in slot 4))
      • (Item-type of (Item being manipulated)) Not equal to (Item-type of (Item carried by (Hero manipulating item) in slot 5))
      • (Item-type of (Item being manipulated)) Not equal to (Item-type of (Item carried by (Hero manipulating item) in slot 6))
    • Then - Actions
      • Do nothing
    • Else - Actions
      • Item - Remove (Item being manipulated)

My problem with this trigger is that it removes any item even if you don't have it already, i think i know where the problem is (that my trigger detects the item you buy as one from the 6 inventory slots), but i'm not sure how to fix this

Ohh sorry, i think i posted this in the wrong area.

 

[defskull]

Here it is.

 

[Upsidedownface]

I didn't consider using variables on this, thankyou
I will spend a while seeing what i can do this this

 

[defskull]

Wait, that is for one item... I have made it wrongly @.@"
Will turn it to global items, I'll try to fix it.