Created attachment 105921 [details] Choosing AHD v2 Quality then updating. Choosing the AHD v2 Quality and updating.
*** This bug has been marked as a duplicate of bug 380844 ***
AHD V2 demosaicing was removed from last libraw 0.19.0. So with digiKam 6.0.0 including this libraw version, the problem disappear. Gilles Caulier