How to Un delete PO at mass Level

I have received a request from my client to delete PO line item at mass level.

Well, I went to TCODE MASS>OBJECT TYPE 2012>EXECUTE the program

Under this Program, I can see Purchase order line item level

So I have done deletion successfully, after deleting the  PO, I was doing some random check,

Unfortunately, I found out I have deleted valid PO, where PO history active. Some PO has IBD and some PO MIGO also performed .

Now I went SQVI and join the table EKPO and EKBE and Found the list , It is almost 1500 PO line item . I have to UNDELETE those PO line item

1. Why I can not Undelete it now from MASS PO transaction

2. I thought If Delivery complete indicator is check and PO history available , MASS PO will not delete the PO, but it deleted my PO line item

3.Without LSMW or BDC, is there any other way ?