Subscriptions no longer support modifying the source parameter directlyBreaking changes
What’s new
Subscription endpoints no longer support the source parameter. If you want to change the default source for a customer, use the Source creation API to add the new source, and then the Customer update API to set it as the default.
Impact
This change removes the ability to directly update a subscription’s payment source through subscription endpoints. You must now use a two-step process: first adding a new source through the Source Creation API, then updating the customer’s default source using the Customer Update API. This modification might require significant updates to existing code that manages subscription payment sources