Trying to RequestMapping a submit, but I get this error, and I really dont understand why, because I thought everyone was provided :

There was an unexpected error (type=Bad Request, status=400).

Required Integer parameter 'idVac' is not present

[...]

function deleteRecord(idVac) {



var newwindow;

newwindow=window.confirm(Are you sure);

if(newwindow == true) {

    alert(Condition is true);

    var form = document.createElement(form);

    form.setAttribute(name, form);

    form.setAttribute(method, post);

    form.setAttribute(action, /vacEditDelete);

    var vacancyId = document.createElement(input);

    vacancyId.setAttribute(type, hidden);

    vacancyId.setAttribute(name, vacancyId);

    vacancyId.setAttribute(value, idVac);



    var csrf = document.createElement(input);

    csrf.setAttribute(type, hidden);

    csrf.setAttribute(name, ${_csrf.parameterName});

    csrf.setAttribute(value, ${_csrf.token});

    form.appendChild(csrf);



    document.body.appendChild(form);

    form.submit();



}

}

The method upon is mapping on this method in my Controller:

@RequestMapping(value = /vacEditDelete, method = RequestMethod.POST)

public String deleteVacancy(@AuthenticationPrincipal User currentuser,

                            @RequestParam(value = idVac, required = true) Integer idVac){

    System.out.println(Method called);

    vacService.deleteVacancyByID(idVac);



    return redirect:/vacEdit;





}