PO line item quantity getting doubled

Hi Experts,

We are facing one issue in which the line item quantities are getting doubled. The PO doc type is UB. I have checked the delivery schedule tab in PO. there two lines are updated. eg Suppose I am creating PO for 2 quantities. The delivery schedule tab is updated by 1 line 2 and another line by 2. total 4.

Regards

Vivek