In the following use case the transition can only be executed, if the resolution is not set.
Add the condition or validator to the desired transition or create a new transition.
Choose Resolution and select must be empty
The resolution must be empty in order to proceed.
Fields required
Fields required or changed
Not allow a resolution to be set.
This use case is valid for both conditions and validators. The only difference is that you can specify an additional error message when using a validator.