diff --git a/process/DuplicateScanner_lib/process.js b/process/DuplicateScanner_lib/process.js
index 3a8ac98fef85d27bed87a76c753411fcb84fc035..2b206b990d92453bd675312fb7f1f7bbd434952d 100644
--- a/process/DuplicateScanner_lib/process.js
+++ b/process/DuplicateScanner_lib/process.js
@@ -1234,23 +1234,12 @@ _DuplicateScannerUtils._migrateLinkedContactData = function (pSourceContactId, p
 _DuplicateScannerUtils._getLinkedTableInfos = function(pTargetContactId)
 {
     //don't use communications that the target already has
-    var communicationDedupCondition = newWhere(null, newSelect("targetComm.COMMUNICATIONID") 
-            .from("COMMUNICATION", "targetComm")
-            .where(["COMMUNICATION", "CONTACT_ID", "targetComm"], pTargetContactId)
-            .and("targetComm.ADDR = COMMUNICATION.ADDR"),
-        SqlBuilder.NOT_EXISTS());
-    
-    //don't use attributes that the contact already has
-    var targetAttributeSubselect = newSelect("targetAttr.AB_ATTRIBUTERELATIONID")
-        .from("AB_ATTRIBUTERELATION", "targetAttr")
-        .where(["AB_ATTRIBUTERELATION", "OBJECT_ROWID", "targetAttr"], pTargetContactId)
-        .and("targetAttr.AB_ATTRIBUTE_ID = AB_ATTRIBUTERELATION.AB_ATTRIBUTE_ID");
-    
-    AttributeTypeUtil.getAllDatabaseFields().forEach(function (dbColumn)
-    {
-        targetAttributeSubselect.and(newWhere("targetAttr." + dbColumn + " = AB_ATTRIBUTERELATION." + dbColumn)
-            .or("targetAttr." + dbColumn + " is null"));
-    });
+    var targetComms = newSelect("COMMUNICATION.ADDR") 
+        .from("COMMUNICATION")
+        .where("COMMUNICATION.CONTACT_ID", pTargetContactId)
+        .arrayColumn();
+        
+    var communicationDedupCondition = newWhere("COMMUNICATION.ADDR", targetComms, SqlBuilder.NOT_IN());
     
     return[
         ["AB_APPOINTMENTLINK", "OBJECT_ROWID"],
@@ -1284,7 +1273,7 @@ _DuplicateScannerUtils._getLinkedTableInfos = function(pTargetContactId)
         ["DSGVOINFO", "CONTACT_ID"],
         ["TIMETRACKING", "CONTACT_ID"],
         ["ACTIVITYLINK", "OBJECT_ROWID"],
-        ["AB_ATTRIBUTERELATION", "OBJECT_ROWID", newWhere(null, targetAttributeSubselect, SqlBuilder.NOT_EXISTS())],
+        ["AB_ATTRIBUTERELATION", "OBJECT_ROWID"],
 
         ["ASYS_CALENDARLINK", "DBID", "", SqlUtils.getSystemAlias()]
     ];