refresh all dhcp

A while ago I disabled the dhcp server for a bit and then re-enabled it, and then it kept erroring saying “queue already existing” or something like that (as I use DHCP -RADIUS) So I removed all of the queues and that problem went away, but now I am having the problem of it is not recreating many of the queues.

Any ideas on this?

would rebooting it help?

I assume I cannot safely remove all the dhcp server leases?