It looks like Carnage, Vol. 3 #1P and 1Q belong in Carnage Forever.
Carnage, Vol. 3 #1P appears to be a duplicate of Carnage Forever #1D. 1Q doesn’t look like it’s indexed.
Also, Carnage, Vol. 3 #1I and #1N appear to be duplicates. They both say Unknown Virgin cover and have the same barcode. The trade dress is indexed as 1M.