Revision 217 is awaiting manual review, and other revisions need to wait for that to be resolved before they can in turn undergo automated review.
You need to wait for a manual review of revision 217; or, if you have fixed the issue that caused revision 217 to be held for manual review and want to discard revision 217 (marked as rejected by developer and removed from the review queue), you can do that.
Here you can find the reasons for the manual review request, and a “reject and remove from review queue” button at the bottom.