Changing the Service Contract Status
After the service contract is signed, the Change Status field value is automatically set to Locked. If you want to modify information in the service contract or service contract quote, first you have to change the status of the contract or contract quote from Locked to Open. Note that you cannot create service invoices for the service contract with the Open change status. After the contract or contract quote is modified, you have to change the status back to Locked to make it possible to create service invoices and ledger entries for the service contract, which includes the changes that you made to it.
Note
The Change Status field is not related to the Release Status field on the service order header, which governs the warehouse handling of service items.