How to resume workflows stuck on "pending"?

[oncet]

I can't find out why but one of my workflow instances got stuck on "pending" for a few days already.

I tried to resume it by using:

$workflow = WorkflowStub::load($id);
$workflow->resume();

But it seems that is not possible because I get this message:

Transition from `pending` to `pending` on model `Workflow\\Models\\StoredWorkflow` was not found, did you forget to register it in `Workflow\\Models\\StoredWorkflow::registerStates()`?

I tried looking for registerStates() on the docs but couldn't find anything related.

Any ideas?

[rmcdaniel]

Pending status means that it was scheduled for execution i.e. the job called dispatch(). One option is to manually change the status to something else like "waiting" and try it from there.

You can ignore the message about "registerStates". That just means that the state machine won't allow that transition.