Updating Multiperiod AP Invoice Line distribution combination

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We have a Multiperiod AP invoice with a single line, which was created in APR-20. This Invoice is already Validated, Accounted and Paid for APR-20 and MAY-20. 

This is a Manual standard AP invoice, Non PO based.

During MAY-20 closing, it is notice that the Invoice line distribution combination is wrongly entered and needs to be corrected. But, The Distribution combination field is grayed out and non-editable. As i understood, this is intended and cannot be updated.

APR-20 and MAY-20 periods are closed. MPA is not run for JUN-20 for this invoice yet.

There is an option, to cancel the line and create a new line with the correct distribution combination. But, We want to understand the impact of this. If we cancel this line, what would happen to the accounting and MP accounting for APR-20 and MAY-20?