Changes to Change Payment Plan

the detail/items response's property type changed from object to string for status 422

removed the required property detail/items/loc from the response with the 422 status

removed the required property detail/items/msg from the response with the 422 status

removed the required property detail/items/type from the response with the 422 status

added the new optional request property display_name

added the new developer_07_2026 enum value to the request property tier

added the new developer_10_2026 enum value to the request property tier

added the new free_07_2026 enum value to the request property tier

added the new free_10_2026 enum value to the request property tier

added the new plus_07_2026 enum value to the request property tier

added the new plus_10_2026 enum value to the request property tier

added the new startup_07_2026 enum value to the request property tier

added the new startup_10_2026 enum value to the request property tier