Attribute_lib update usages fix

process/Attribute_lib/process.js

@@ -1079,7 +1079,7 @@ AttributeUsageUtil.insertChildrenUsages = function (pAttributeId, pObjectType)
  */
 AttributeUsageUtil.updateChildrenUsages = function (pAttributeId, pOldObjectType, pNewObjectType)
 {
-    if (!pNewObjectType || !pAttributeId)
+    if (!pNewObjectType || !pAttributeId || !pOldObjectType)
         return;
     
     var table = "AB_ATTRIBUTEUSAGE";
@@ -1114,7 +1114,7 @@ AttributeUsageUtil.updateChildrenUsages = function (pAttributeId, pOldObjectType
         var condition = SqlCondition.begin()
             .andPrepare("AB_ATTRIBUTE.ATTRIBUTE_TYPE", $AttributeTypes.COMBOVALUE, "# != ?")
             .andPrepare("AB_ATTRIBUTE.ATTRIBUTE_PARENT_ID", pAttributeId);
-        var query = sqlSelect.where(condition);
+        var query = sqlSelect.clearWhere().where(condition);
         var attributes = db.table(query.build());
         
         attributes.forEach(function (row)