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At that point the next button does not work anymore and cherokee-admin has to be restarted to get it working again. Closing the wizard does not help.
Does your pull request fix the entire ticket?
Yes. Line https://github.com/cherokee/webserver/blob/master/admin/wizards/rails.py#L371 throws an exception when clicking "next" after step 3, because it has been already removed on step 2.
Merge pull request #73 from Borkason/fix-#50
Thanks Borkason for this very elegant fix for Issue #50