# System processes

System processes are processes that are critical to the functioning of Valtimo itself. Since these processes should be handled with care, these processes are flagged as read-only by default. When a process is read-only, it is not possible to update the process or deploy it.

![Read only system process](/files/PnHA1hNOw6fhiWC2sqIX)

A process can be marked as a system process by setting a property called `systemProcess` to `true` on the model itself under the `Extensions` tab.

![Setting system process property](/files/eKhicNEfsmCQNpf2PTpz)

## Make system process updatable

By default, system processes are marked as read-only. To override this, a property has to be set in the `application.yml` of the back-end implementation. The property is called `valtimo.process.systemProcessUpdatable` and this should have the value `true`. The default value of this property is `false`.

```yaml
valtimo:
    process:
        systemProcessUpdatable: true
```

When a system process is updatable it is possible to make changes to the process and the `Deploy` button is available again. A message is shown to warn the user about changing a system process.

![System process](/files/x6v8K5EQDJiiRktDFUx5)


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