Disabling flying mount spell


I try to disable flying mount by putting spells 34090, 34091, 34092, 34093 in “disables” table of the DB, but I still can learn it and fly, do you have any idea of how I can “block” the flying mount (for Outland and Northrend)

Edit : Or if you can tell me, how in cpp I can do to just disable the flying function and still let the mount ridable (so it became a no-flying mount) I would appreciate, thanks

Up (almost 40 views and no one to share any idea about it? :huh: )