Purchase Requisition Type are being transferred into Internal Requisition - How to prevent?

Hellu Gurus,

My Purchase Requisition type are being transferred into Internal Requisition and converted into Sales Orders.

I would like only my Internal Requisition Type to be transferred into Internal Orders.

Could you please tell me which setups is missing so that Purchase Requisition type are not being sent over to Order Management (Sales Orders).

Thanks so much

Regards

Philip Darby