changing an account on opportunity does not automatically update the account on revenue related ite

Hi,

We have a situation where we have multiple Revenue line items associated with an opportunity and the problem we are facing is that whenever a users goes in and change the account on the opportunity record, the change does not trickle down to revenue line item. The line item still shows the old account name.

Do anyone know how to fix this or if there is any workaround for it.

Thanks,

Mo