SeLLeRoNe
Super Moderator
I saw that error when i try manually to re-send all zones to slaves using task.queue file, maybe is not related 
Regarding your issue, my guess was to restart DS.. but since you already did that and it worked... nothing to say just except that maybe DS was somehow stucked and not working correctly
Regards

Regarding your issue, my guess was to restart DS.. but since you already did that and it worked... nothing to say just except that maybe DS was somehow stucked and not working correctly
Regards