Group forum permission: Can see forum gives NO SQL ERROR

Basically, if "Can see topics" is YES and "Can read forum" is NO = Error.
But, If "Can see topics" is NO and "Can read forum" is NO = Works.

Full information and Possible Solution provided here: 
https://www.phpbb.com/community/viewtopic.php?f=556&t=2462036&p=15007851#p15007851