grouping mutliple Purchase requisitions created through order proposal

Hi All,

We have a client process where we are generating the purchase requisition through create order proposal with database schedule.

Here, we system creates multiple PRs for each parts depending on the inventory part planning method demand when onhand qty falls below the lot size.

We want to create only one single PR combining all the inventory parts in it.

So, please let us know if there is any method to create a single PR containing all inventory parts.