diff --git a/libs/core.js b/libs/core.js
index f88e0592..3e67bfff 100644
--- a/libs/core.js
+++ b/libs/core.js
@@ -236,11 +236,6 @@ core.prototype.init = function (coreData, callback) {
     document.getElementById("startLogo").innerHTML = core.firstData.title;
     core.material.items = core.clone(core.items.getItems());
     core.material.enemys = core.clone(core.enemys.getEnemys());
-    if (main.mode == 'play') {
-        for (var enemyId in core.material.enemys) {
-            core.material.enemys[enemyId].id = enemyId;
-        }
-    }
     core.material.icons = core.icons.getIcons();
     core.material.events = core.events.getEvents();