PATCHing task id stops execution

[gargooza]

1.0.0~beta1 (git: master c6f7db5)

When I change the id for a task that is enabled and executing the status remains enabled, but the execution state becomes false. Thanks to your solution to #613 I can at least change the name successfully, but now my newly named task stops executing. I can successfully PATCH some task properties (e.g. script) without changing the execution state. I just can't change the id for a task without execution state going from true to false.