Błąd z głową gracza

on death of player:
    drop player head named "&6Glowka gracza %victim%" at victim
on rightclick holding player head:
        apply regeneration of tier 3 to player for 5 seconds       
        remove 1 player head from player's inventory
on leftclick holding player head:
        apply regeneration of tier 3 to player for 5 seconds   
        remove 1 player head from player's inventory
on place:
    if player's tool is player head named "&6Glowka gracza %victim%":
        cancel event

Co muszę tutaj poprawić żeby nie dało się stawiac głowy gracza?

//Usuwam pastebina ~Ixidi