scheduled reprots failing

Hi everyone,
 
We’ve just upgraded from 12.5 to 14.1 this week, and I’ve noticed that some of our scheduled reports are failing.  It seems that the fails are coming from reports scheduled by users that are no longer with us and who have been inactivated in the security module.  Is this a known thing, and will they stop failing if I re-activate the old users, do you think?
 
Thanks,
Kathleen