We have environment where was some subpages created on system level (no partitions). When partitions was created then all subpages on object project was created in newly created partition.
But if I want to delete subpage its possible only on system level. Even I delete this subpage on system level it still persist on partition.
I don't know how to delete it, but you could just set a display condition on the subpage such that it is never "true" (for example "when 1=0") - this would "hide" the subpage from all.
Sure I know but be carefull with this condition there is a bug with displaying subpages under this one.
Sometimes when you use this condition that subpages lower than this one will not be displayed.
I dont know nr. of this bug but we facing them.
for Clarity 8.1 and 12.1 it was OK but on 13.X doesnt work.
So we use condition which can be fullfilled but will never be fullfilled. like if project name ="ěščřžýáj never used name for project"