Three same material document number generated for single PO line item.

Hi,

I found three same material number has been generated for single PO line item. Is there any specific reason for this.

Here is the detail.

PO

LN qty

10 100

PO history for LN 10

Mat doc qty price

5000000000 100 100

5000000000 100 100

5000000000 100 100