I am pursuing a thought that JG52 made claims for what they identified as Jak-1 and Jak-7 but that may have actually been LaGG-3 of the Black Sea Fleet.
This is based on a very, very slight idea that the Black Sea Fleet were still using the LaGG-3 in 1944. It falls apart if the Black Sea Fleet were using Yak-1/7 in 1944
regards
Keith