Step 1 : Modify the pass associated with the subscription

Go to the member's file > Click on "Billing" then on the subscription in question at the bottom of the page.

Once on the subscription, click on the little pencil in the "Settings".

Select the new pass that will be associated with this subscription.

Don't forget to click on "Save".

Step 2 : Change the amount of the next invoices

Click on the small pencil of the next invoice > Click on "Change the price".

Indicate the new amount > Check "Update all future payments".

Finally, don't forget to click on "Save".