Seems to be related to the change in the main Create Water spell. It is now Create/Destroy Water but the staff just does the create part and it is perhaps considered an invalid spell now. If you give it to a character who knows the Create/Destroy spell, like a Druid, it messes up their prepared spell count. And if they prepare Create/Destroy Water, the staff's create option will show up there when you open the spell to choose which use of it you want. You'll have three options, create, destroy, and the staff's create. But that seems to be the only way to access it.