Getting Error in import "A duplicate lookup reference was found.".

Hi,

I have requirement to import data, single record can be identify by the combination of 4 columns/attributes as below.

1. Name

2. ID(it can be multiple- so i can not dependent only on it)

3. Language

4. Lookup Field

- Data In Current Entity

- Data In Lookup Entity

So while Inserting Data with Lookup field getting error, as lookup entity having same name.

Here is the issue with mapping of the Lookup field of current entity and Name field with lookup entity, but i have required the mapping of multiple columns.

Eg.

Id,Language and Lookup filed of current entity 

with

Name and language