Deletion of Operation in work order

Hello All,

We have one opeartion in a work order. Under that operation there is Service and one component.

PR is created for those service and component. PO is created only for component( not service as it was not released for PO) and also GR is done for that component.

*Now the question is if i want to delete that operation from work order then how it is possible". As directly i may not delete as serivice is present in PR and component is present in PR, PO and GR.

One way i can understand is do reversal GR of component, cancel PO and PR. Then go for deletion of operations from work order.

Is there any other way around. My first priority is to delete serivice.

Thanks

Himanshu