When creating a new subscription with the woocommerce subscriptions plugin and with the groups and groups for woocommerce plugin/extension, I am able to set a duration for the group (which would typically be set to the length of the subscription). I left this blank when creating my first subscription, then I manually created a subscription for a user. I set the order date to a year past and the subscription to be a yearly one. This created an expiration date of expired, which is what I wanted. I noticed, though, that the group assignation was not removed for the customer although the subscription was set to expired. I then realized that it must have to do with the group duration time frame. I went to edit the product and noticed that the group duration option was no longer available. I then tested the creating of a new subscription product and the group duration period was available there. So, the group duration period is able to be set when a new product is created, but once the product has been created, the group duration period is uneditable. How can I edit this after a product is created?