Cancels default sign interaction event

src/main/java/net/knarcraft/permissionsigns/listener/SignListener.java

@@ -53,6 +53,8 @@ public class SignListener implements Listener {
 
         Sign sign = (Sign) block.getState();
         if (event.getHand() == EquipmentSlot.HAND) {
+            // Cancel the interaction to avoid sign editing
+            event.setCancelled(true);
             handleSignClick(sign, player, event.getAction(), event);
         }
     }