Renewable subscription plan

Hi everybody,

I wonder if there is a way to define some conditions on renewable subscription plans:
Here is my scenario:
I've set up 2 subscription plans, the first for student people, the second for senior people.
I would like student people could renew their Student subscription plan or upgrade it to a Senior plan.
But when they became Senior member, they should only renew the Senior Subscription plan and not go back (downgrade) to a Student plan.

Kind regards

The only way to do that is to ensure both plans are parent plans. If you make Senior a child plan of the Student plan then they must maintain an active Student plan to have the child plan. Set both of your plans to exclusive and set the Student plan to not allow upgrades then set the Senior plan to allow upgrades.