If you sell a subscription, and you want to add on another item that is also recurring subscription, it should total up ALL recurring subscription charges into one instead of give an error of only one subscription is allowed. So if I sell a voice AI agent for $500 a month, and want to give the customer a website option (not every customer will want or need a website - hence a bump option) and I want to charge $50 a month for the website, if I add that bump, then the total subscription should change to the $500 + $50 or $550/mo, instead of giving an error that more than one subscription is not allowed. And if I have another bump, like I add another AI agent for $250 a month, it should update the price again to $500 + 50 + $250 for $800 a month subscription. So it is not "multiple subscriptions" but one, for the new total. See error in attached screenshot.