Adding queue member to queue that exists causes error

Using the queues module 2.4.0.9 if you accidentally add a static member to a queue who is already a static member, you will get a DB error that it already exists, and everything for that queue gets wiped from the queues_config db table for that queue. The entries in queues_details will remain, but the queues_config stuff being missing causes the queue to not show up in the menu on the right. Entering the URL to get to the queue by hand will allow you to get to the config page for the queue to restore the settings and you can succesfully submit and get the queue working again.

I realize that adding a member to a queue that already exists is a user error, but the error needs to be handled gracefully and not result in blowing away the queue_config entries.