I am not sure how to tell my version of DokuWiki but I think it is the latest stable release.
is your friend.
then started one day and we are not sure why?
Things never start without a reason. Did you change anything? Installed plugins? Upgraded/changed anything on the server? It sounds like the server's clock is running amok. Have you checked this? Maybe you disabled file modification dates for performance reasons? Start looking in that direction first.