diff --git a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecobosses/bosses/EcoBoss.kt b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecobosses/bosses/EcoBoss.kt
index 4b0de1a..d22e70b 100644
--- a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecobosses/bosses/EcoBoss.kt
+++ b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecobosses/bosses/EcoBoss.kt
@@ -312,7 +312,7 @@ class EcoBoss(
         mob.persistentDataContainer.set(
             plugin.namespacedKeyFactory.create("boss"),
             PersistentDataType.STRING,
-            "backwards_compat"
+            this.id
         )
 
         val boss = LivingEcoBoss(