>> This indicates that your application is trying to render a template
>> that matches your `create` method in your controller. Generally
>> speaking, you don't want to render templates from controller methods
>> that update your data base, such as `create`, `update`, and `destroy`,
>> since this could result in the user sending the same request if they
>> reload that page. So instead, you want to perform a redirect. Show us
>> the controller source code and maybe someone can help with that. Or if
>> this is enough a clue, carry on learning!

Thank you very much for your clue. I have solved error.

Kind regards.

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