BindingResult nor plain target object for bean name 'fileName' available as request attribute " while trying to update a raw in my db, - jpa

Question

I'm getting this exception while trying to update a row in my database. I performed a lot of research in Google all I find is that I should add #modelAttribute which is already done.
I also found that I need to add bindind result after #ModelAttribute but this also didn't work so I removed it. I'm using JPA for persistence to manipulate my data, spring boot and thymeleaf for my views.
These are my Controllers one for updating and rendering views
#GetMapping("/edit/{id}")
public ModelAndView UpdateList(#PathVariable(name="id") String id) {
ModelAndView mav = new ModelAndView("updateList");
com.pfe.ClientRest.model.Files files = fileServ.get(id);
mav.addObject("Files", files);
return mav ;
}
#PostMapping("/Save")
public String saveRepport(#ModelAttribute("Files") com.pfe.ClientRest.model.Files dbfile) {
fileServ.save(dbfile);
return "/redirect:/ListFile";
}
this is my entity class I have getter setters and constructors
#Table( name="Files")
#Entity
public class Files {
#GeneratedValue(generator = "uuid")
#GenericGenerator(name = "uuid", strategy = "uuid2")
#Id
private String id;
private String FileName;
private String Verif;
public String getId() {
return id;
}
this is my template.
<div class="container">
<h1> Modifier les informations du Rapports</h1>
<form action="#" th:action="#{/Save}" th:objects="${Files}"
method="post" >
<input type="text" th:field=*{id} readonly="readonly"/>
<input type="text" th:field="*{fileName}" placeholder="Nom du Fichier"
class="form-control mb-4
col-4">
<input type="text" th:field="*{verif}" placeholder="Accepted/Rejected"
class="form-control mb-4
col-4">
<button type="submit" class="btn btn-info col-2"> Mettre à jour</button>
</form>
</div>

Answer 1

The field names in the html page and entity class does not match. These are case sensitive. So the correct one should be
private String fileName;
private String verif;