diff --git a/src/main/java/world/bentobox/challenges/managers/ChallengesManager.java b/src/main/java/world/bentobox/challenges/managers/ChallengesManager.java
index a2e9f13..27f2289 100644
--- a/src/main/java/world/bentobox/challenges/managers/ChallengesManager.java
+++ b/src/main/java/world/bentobox/challenges/managers/ChallengesManager.java
@@ -656,7 +656,11 @@ public class ChallengesManager
     public void migrateDatabase(User user, World world)
     {
         world = Util.getWorld(world);
-
+        if (world == null) {
+            this.addon.logError("No such world!");
+            return;
+        }
+        
         if (user.isPlayer())
         {
             Utils.sendMessage(user, user.getTranslation("challenges.messages.migrate-start"));