Try changing your code to
@RequestMapping(value = CACHE_REMOVE, method = RequestMethod.POST)
public String removeCachedElement(ModelMap model, @Valid @ModelAttribute(FORM_NAME) RemoveCacheElementForm form, BindingResult bindingResult) {
model.addAttribute("removeElementResult", CacheUtils.removeCachedElement(form.getName(), form.getKey()));
initializeModel(model);
return CACHE_ADMIN_PAGE;
}