Who is the subscribing member in my workspace?
The subscribing member is the admin who last added the payment details (credit card information) to the workspace. Subscribing members cannot be removed or deactivated from a workspace, unless the subscribing user is changed.
Changing the subscribing member
Another workspace admin needs to re-enter or update the payment information on their own subscription page, in order to become the new subscribing member from that point on.
After that, you will be able to remove or deactivate the previous subscribing member from your workspace.