Current index overwriting previous record

Hey all,

I'm currently trying to migrate a product line and my current indexing is allowing population of the DMF table, but not the target table. The target table is being updated by the DMF table, but it keeps overwriting the most previous record and the number over records does not increase.

The fields in the table include: CustItemDesc, ItemId, ItemNum, ItemSuffix, ProdLineId. ItemId is unique.

Target Table Properties:

Target index properties:

Target Index:

DMF table properties:

DMF index and properties:

Thanks in advance