Unable to create revision of sales order with order management extension to apply Hold

We have successfully applied extensions to apply hold for sales order. But while creating revision for the sales order system gives error.

Feedback from the Oracle support is : "As per the system design, holds can only be applied at the time of order creation and not at the time of revision using extensions ."

We need ideas to handle revisions for the sales order with the extensions for hold.

Extension code is as below:

import oracle.apps.scm.doo.common.extensions.ValidationException;

import oracle.apps.scm.doo.common.extensions.Message;

List<Message> msgs = new ArrayList<Message>();

def OrderType = header.getAttribute("TransactionTypeCode")