Accounting rules

I created an invoice with a deferred accounting rule attached and then ran revenue recognition.  I have since determined that the accounting rule is incorrect but the system will not allow me to change the rule attached to the invoice.  (The rule will spread the revenue over 12 months once I use Revenue accounting to schedule the revenue.)  How can I fix this?  Is there any way to adjust the monthly amounts that revenue accounting creates or change the rule that is attached to the invoice?

I am on 11.5.10.2.