Solved Factions pvp betweens allies players

Hi, I have a problem for players of the same faction can be damaged. The code I am using for this is:

Code:java

          public  void onplayerpvpfactions(FactionsEventPvpDisallowed event){
            Player attacker = event.getAttacker();
            Player defender = event.getDefender();
 
              if(!MultiEventos.getPlayerListManager().containsPlayer(defender) ||
                        !MultiEventos.getPlayerListManager().containsPlayer(attacker)) return;
 
 
                  event.getEvent().setCancelled(false);
 
          }

But the pvp between allies players o players in same faction is cancelled.
I could not find any solution in other plugins source code or in this forum.
If anyone has a solution to this problem would be greatly appreciated!
sorry for my English. Greetings

anyone?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

i solve this importing mcore lib in my plugin