generator-jhipster: Request method 'POST' not supported

When I generated my first entity with a one-to-many relationship, when running the app, I got the message “Request method ‘POST’ not supported” everytime I want to save a new record.

Here a paste some log messages:

[DEBUG] org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor - Written [{timestamp=Sat Oct 03 15:13:47 CDT 2015, status=405, error=Method Not Allowed, exception=org.springframework.web.HttpRequestMethodNotSupportedException, message=Request method 'POST' not supported, path=/api/items}] as "application/json;charset=UTF-8" using [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter@635d2bbc]
[DEBUG] org.springframework.web.servlet.DispatcherServlet - Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
[DEBUG] org.springframework.web.servlet.DispatcherServlet - Successfully completed request

[locations=[ServletContext resource [/], class path resource [META-INF/resources/], class path resource [resources/], class path resource [static/], class path resource [public/]], resolvers=[org.springframework.web.servlet.resource.PathResourceResolver@6c5c9e23]]]: org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'POST' not supported