Error passing between Model and ViewModel? - asp.net-mvc

Question

In the previous question "ASP .NET Core Repository Id Article passed in was changed to 0?" I did it successfully, but due to a conflict with the team on GitHub, I had to rewrite my code. However, when I run it, I have a transmission error between Model and ViewModel. What is this and how do I fix it? I don't change anything between my code.
Controller
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult EditArticle(Article article)
{
if(!ModelState.IsValid)
{
return View(article);
}
if(!_studentRepository.EditArticle(article))
{
throw new ArgumentException("...");
}
return RedirectToAction("Index");
}
View
#model Megatron.ViewModels.ArticleFacultyViewModel
#{
ViewData["Title"] = "Edit Article";
}
<div>
<form asp-action="EditArticle">
<partial name="_StatusMessage" model="#ViewData["Message"]" />
<div>
#Html.HiddenFor(a => a.Article.Id)
<div class="form-group row">
<div class="col-2">
<label asp-for="Article.Title" class="col-form-label"></label>
</div>
<div class="col-5">
<input asp-for="Article.Title" class="form-control" />
</div>
</div>
<div class="form-group row">
<div class="col-2">
<label class="col-form-label">Type of contribution</label>
</div>
<div class="col-3">
<button hidden class="btn btn-primary" type="button" data-toggle="collapse" data-target="#ImportFileCollapse" aria-expanded="false" aria-controls="ImportFileCollapse">
</button>
<button hidden class="btn btn-primary" type="button" data-toggle="collapse" data-target="#TextAreaCollapse" aria-expanded="false" aria-controls="TextAreaCollapse">
</button>
<button id="button-collapse" class="btn btn-primary" type="button" data-toggle="collapse" data-target=".multi-collapse" aria-expanded="false" aria-controls="ImportFileCollapse TextAreaCollapse">
Switch to Editor
</button>
</div>
</div>

Answer 1

You return a Artical type model to the View in the post method,
if(!ModelState.IsValid)
{
return View(article);
}
While the view expect a
ArticleFacultyViewModel type model. You may convert it.
if(!ModelState.IsValid)
{
var articleVM = new ArticleFacultyViewModel
{
Article = article,
Faculties = _facultyRepository.GetFaculties()
};
return View(articleVM);
}