diff --git a/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/operation/SoftCopyOperator.java b/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/operation/SoftCopyOperator.java
index 96acf11..90a46ef 100644
--- a/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/operation/SoftCopyOperator.java
+++ b/src/main/java/org/gcube/contentmanagement/blobstorage/transport/backend/operation/SoftCopyOperator.java
@@ -127,7 +127,7 @@ public class SoftCopyOperator extends SoftCopy {
 				ObjectId md5Id=getDuplicatesMap(md5);
 			// check if the source object is already a map	
 				if(isMap(sourceObject)){
-					logger.debug("the sourceObject with the following id: "+mapId+" is already a map");
+					logger.debug("the sourceObject with the following id: "+sourceId+" is already a map");
 					mapId=sourceId;
 			// then it's needed to add only the destObject to the map	
 			//first: create link object to destination place