I discoverd n error in my military logbook some years in. I made the adjustment to the next total, write a brief explanation of the adjustment, I and a supervisor signed and dated the adjustment, and I never heard a little about it. I don;t think my logbooks were scrubbed very throughlu though in the few interviews that I went through post militry.
During the process, I scubbed my civilian logbooks too and found an error. I went through the same procedure, without a supervisors signature, but if I had one - or an instructor - or someone else in a position of authority, I would have them sign also.
Personally I would just forget about it because I like to have everything add up just right; but that is just me being picky. Obviously it doesn't really matter as long as the times are correctly logged that you need by the FARs. I know guys who have quit keeping a logbook.
USMCFLYR