From ca721368ea13fa3297d627708739f5a49eb47ae6 Mon Sep 17 00:00:00 2001
From: Frank <developer@ambertation.de>
Date: Tue, 10 Aug 2021 23:39:34 +0200
Subject: [PATCH] Make sure Mods are not registered twice

---
 src/main/java/ru/bclib/api/dataexchange/DataExchangeAPI.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/ru/bclib/api/dataexchange/DataExchangeAPI.java b/src/main/java/ru/bclib/api/dataexchange/DataExchangeAPI.java
index e6029146..0bc6d442 100644
--- a/src/main/java/ru/bclib/api/dataexchange/DataExchangeAPI.java
+++ b/src/main/java/ru/bclib/api/dataexchange/DataExchangeAPI.java
@@ -47,7 +47,8 @@ public class DataExchangeAPI extends DataExchange {
      * @param modID - {@link String} modID.
      */
     public static void registerMod(String modID) {
-        MODS.add(modID);
+        if (!MODS.contains(modID))
+            MODS.add(modID);
     }
 
     /**