Been there, done that. When I figure out what the optimum settings are on a new bass I'd rather not even touch the controls after that. Trouble is knobs tend to move on their own ....
Duct tape, anyone?
I know a bass player who took the knobs off her pots so it would be harder to accidentally change settings on her bass. Then should put tape over the pots so she wouldn't shred her hands on the exposed pot shafts.