Defined Names Referring To Nonexistent Range Won't Pick Up Once Existing

I have created 500+ defined names that refer to worksheets that do not exist (yet). When I add the previously nonexistent worksheets, the defined names that refer to them are not "live" and do not work in functions where that name is used. If you go into the defined names and click on the ones that refer to the now existent worksheet, they start to work, but I was hoping there was a way around this step (e.g. a simple macro that says "update all defined names").

I created all the names so that the person who will eventually be using this will only have to add an appropriately named worksheet and put the data in...then everything will automatically work. I do not think adding names is difficult, but the person who will be using this does, so I want to avoid that person mucking around in my names.