Don't bail out after first call to enqueue, since multiple haystack write routers may exist.
Don't bail out after first call to enqueue, since multiple haystack write routers may exist.

iXioN/celery-haystack,stefanw/celery-haystack,frewsxcv/celery-haystack,roverdotcom/celery-haystack,barseghyanartur/celery-haystack,strongholder/celery-haystack