When you delete an exhibit and then create a new one with the same name, the items from the previous incarnation are still there

Note that Kevin was able to fix this issue by deleting the solr index on the server and then running: RAILS_ENV=staging rake tmp:cache:clear

I don't know that we can fix this, but we can use the workaround Kevin performed. Can we document the specifics of this workaround? This also impacts local development environments we deleting and re-creating exhibits.

Perhaps we could completely disable this caching?