Suggestions to cancel all orders for specific parts despite open demand

We are having a problem where certain parts (that are all used on the same assembly) are generating suggestions to cancel all open POs and no suggestions to place new POs despite having demand for those parts. The time phase image below highlights the problematic suggestions. I have looked at the parts in question and generate purchase orders is activated in the part master. This part has correct suggestions in our sandbox system which is a ~1year old copy of our database. I suspect we changed a setting somewhere that has broken the suggestion process for this part but I don’t know where to look. Do you have any ideas?