Upstream kafs developers have discussed this bug report. A issue hasbeen created on gitlab, https://gitlab.com/linux-afs/kafs-client/-/issues/2.
The upshot of the discussion is that the use of -m32 and -m64 should be conditionalized based on the architecture. Bill -- Man knows so little about his fellows. In his eyes all men or women act upon what he believes would motivate him if he were mad enough to do what that other man or woman is doing. William Faulkner
