diff --git a/src/main/java/emu/grasscutter/game/avatar/Avatar.java b/src/main/java/emu/grasscutter/game/avatar/Avatar.java
index 3f961b8b9..357981913 100644
--- a/src/main/java/emu/grasscutter/game/avatar/Avatar.java
+++ b/src/main/java/emu/grasscutter/game/avatar/Avatar.java
@@ -895,6 +895,7 @@ public class Avatar {
 
     public boolean unlockConstellation(boolean skipPayment) {
         int currentTalentLevel = this.getCoreProudSkillLevel();
+        if (currentTalentLevel < 0) return false;
         int talentId = this.skillDepot.getTalents().get(currentTalentLevel);
         return this.unlockConstellation(talentId, skipPayment);
     }