Reversal not possible due to purchase order history summarization

What causes this issue?

You want to reverse an account maintenance document with reference to
purchase orders with multiple account assignment.
The system has established that the corresponding purchase order
histories are present summarized.

System Response

Reversing the account maintenance document is not supported for this
scenario.
You cannot post the document.

How to fix this error?

Cancel the summarization of the histories for the appropriate purchase
orders using transaction ME87.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.