Fixed the chest id generation

_chest_handler/chest_setter.lua

@@ -10,6 +10,20 @@ end
 
 
 
+function skywars.generate_chest_id(arena)
+	local max_id = 1
+	
+	for i = 1, #arena.chests do
+		if arena.chests[i].id > max_id then
+			max_id = arena.chests[i].id
+		end
+	end
+
+	return max_id+1
+end
+
+
+
 function fill_chests(arena)
   for i, chest in pairs(arena.chests) do
     local treasures = skywars.select_random_treasures(chest, arena)

commands.lua

@@ -385,8 +385,7 @@ ChatCmdBuilder.new("skywars", function(cmd)
             return
         end
         
-        local chest_id = 1
-        if arena.chests[#arena.chests] then chest_id = arena.chests[#arena.chests].id+1 end
+        local chest_id = skywars.generate_chest_id(arena)
         local chest = 
         {
             pos = pos,