Detailed changelogs for this period can be tracked on the Official Escape from Tarkov Wiki . Are you experiencing a with this version, or
The patch increased the protection width and height for front, back, and side ballistic plates. New colliders were added specifically to cover the armpit area at chest level and the collarbone area
Explaining how to associated with this build.
That pattern ( -3.9.0-30626 ) is typical of the (Single Player Tarkov) mod/emulator project, which uses its own versioning (e.g., 3.9.0 ) mapped to a specific live EFT client build.