Prevent sales order modification after shipment confirmation

Hi,

System is accepting any changes in quantity after done the shipment confirmation, so that in item ledger is one quantity and value and in G/L is the value as per the amendment.

We can prevent these type of modification with the processing option of the Status limit 560.  But, in our business, we cannot restrict by the status code as some orders need to modify after the status 560.

Please advise if there is any alternate setup.  Thanks in advance for the help.