I cannot schedule a subscription change at the end of the term while it's scheduled cancelation.
Can't we schedule cancellation and subscription changes at the end of the term?
Why I'm getting the error 'Subscription cannot be updated as it is scheduled for cancellation at end of the current term?
By default, when a subscription is scheduled to cancel at the end of the term or on a specific date, you cannot schedule a subscription change on the same date via UI or API. However, either you can schedule any changes prior to the subscription cancellation date or cancel or change the subscription cancellation schedule.
Remove Schedule Cancellation via UI
You can 'Remove Schedule Cancellation' from 'Subscription Index Page > Subscription details page'
Modify Subscription Change Schedule via UI
Navigate to the Subscription Index Page > Subscription details page > Edit Subscription > Apply Changes > Choose the date before the subscription scheduled cancellation by choosing Immediately or 'On Specific date'.
Note: If you cannot find 'On Specific date' option, refer to this link
Remove Schedule Cancellation via API
Refer to this link to remove scheduled cancellations using API
Modify Subscription Change Schedule via API