Gitlab backup throw error pack-objects died of signal 9

problem is that during backing up of repos, everytime i get the same error, that you can see below ( my gitlab settings are 8x16gb ram and 1.5tb space (if you need more data, let me know) this one repo is about 50gb and it stops my whole process… i have other ones that are bigger and everything goes smoothly.

assuming that hardware is ok, what can i do to complete backup? ps. those repos contains dvd images, but i dont have access to check what exactly

ive increased disk space and ram, tried to reconfigure, but it didnt help. i didnt try yet to increase swap and ram even higher, although it doesnt seem like its going out of memory, ill try to increase it, just to eliminate hardware for 100%