how to change the accounting rule/reschedule revenue?

For most of our contracts we've used an accounting rule that deferred the revenue and scheduled it monthly over the life of the contract, generally over 5 years.  Due to our change from 605 to 606 revenue we no longer need any of these future revenue distributions which is creating extra work to manually reverse every period.  How can we reschedule all the future revenue distributions to be recognized immediately so we can do a 1 time adjustment for these?