diff --git a/src/main/java/net/dreamlu/mica/auto/common/MultiSetMap.java b/src/main/java/net/dreamlu/mica/auto/common/MultiSetMap.java
index d33d2628883ee0bc5b109e95486f83b7a20506f9..f319812671e0686981468ea892c5049e380fa651 100644
--- a/src/main/java/net/dreamlu/mica/auto/common/MultiSetMap.java
+++ b/src/main/java/net/dreamlu/mica/auto/common/MultiSetMap.java
@@ -112,7 +112,9 @@ public class MultiSetMap<K, V> {
 		if (data == null || data.isEmpty()) {
 			return false;
 		} else {
-			map.putAll(data.map);
+			for (K k : data.keySet()) {
+				this.putAll(k, data.get(k));
+			}
 			return true;
 		}
 	}