It is possible that either the surface type or PCN classification for this particular apron is either incorrect or out of date. While this is not the usual thing that you would first suspect when viewing an official aviation document, I think it might be plausible in this case if we put this particular piece of pavement into perspective.
The apron being discussed is at Adana Sakirpasa Airport (ADA, LTAF) in the city of Adana in southern Turkey. Opened in 1937, Adana Airport is Turkey's oldest commercial airport and its sixth largest. The airport is located in the middle of developed areas of the city, and is expected to operate only until the completion of the Cukurova Regional Airport located 20 km outside of the city, which is currently scheduled to open sometime in 2023, although the project seems to have been delayed.
The two pavements being compared, Apron A and Apron D, can be seen in Google Maps satellite view.
Adana Airport (source: Google Maps, imagery: CNES/Airbus, Landsat / Copernicus, Maxar Technologies)
Apron A is located at the passenger terminals, and looking at some random online photos it appears to see mostly 737 and A320 sized airliners. Although the terminal gates can handle aircraft up to A300 (and even 747!), as seen in the DHMI (Turkish Airport Authority) document which also contains the PCN information shown in the question.
LTAF Parking Diagram (source: www.dhmi.gov.tr)
The comparatively tiny Apron D, which is in question because of its confusing surface type designation in the DHMI documents, appears to be sized to hold a small number of general aviation aircraft. Looking at a close-up satellite view it appears that the east section of Apron D can handle up to eight small aircraft, similar in size to the five aircraft seen parked there in the satellite photo, which seems to include a small twin-engine plane.
Apron D (source: Google Maps, imagery: CNES/Airbus, Landsat / Copernicus, Maxar Technologies)
Meanwhile it appears that a hangar has been built on the west section of Apron D. Although it can be noted that the DHMI document still shows eight parking spots in that section, the markings for four of them can still be seen in the photo.
The lack of any apparent facilities at Apron D would seem to indicate that this apron is mainly used for longer term small aircraft storage. A larger general aviation apron with facilities, Apron C, is located on the north side of the airport next to Apron D which is a military apron.
Another DHMI document for Adana Airport lists surface information for all of the taxiways and aprons.
LTAF Apron, Taxiway Information (source: www.dhmi.gov.tr)
This document appears to be current as of January 2023.
It can be noted that all of the taxiways are listed as asphalt except for A1 and E, which go to aprons B and C respectively. Apron D is the only apron listed as asphalt on the document. It can also be noted that Apron D has the exact same PCN values as Apron A, with the only difference being that the surface for Apron D is listed as asphalt. This could be an indication that either the surface type or PCN values listed for Apron D is incorrect or out of date.
It can also be noted that while Wikipedia lists the Adana Airport runway as asphalt, the DAFIF (Digital Aeronautical Flight Information File) information that Wikipedia references was current only as of 2006, which is when DAFIF stopped being available publicly. An unofficial source which appears to be current as of 2016 shows the Adana runway as being composite, a surface type mentioned in another answer.
Looking at all of this in context, it seems possible that since Apron D seems to be used by only a small number of small plane owners, that any errors or inconsistencies as far as surface type classification in the DHMI documents have likely gone unnoticed, or ignored. Especially considering that the Adana airport is expected to close in the relatively near future.