Remove the Subscription billing line once its interfaced

Summary:

We have a subscription created and bill line is successfully interfaced to AR but not processed. We want to remove that bill line or make changes to the amount of that bill line.

We are using the Import Mode as DELETE from Create import activities, and also trying the Delete API using the Postman.

Both of these services are returning an error message as "The data couldn't be imported. Details: You can't perform the operation on this product line because the product line status is {STATUS}. (OSS-6075000)."

We would like to know if there is any option to delete the Interfaced Line or update the amount of an interfaced line from Subscription management.