After adding authorization/registration, the infa has ceased to be stored in the database?

Question

Java

First, I made a mechanism for saving the recipe to the database:

@PostMapping(value = "/foodArray", consumes = {"application/x-www-form-urlencoded"})
    public String recipeAdd(@RequestParam(required = true) String name,
                                            @RequestParam(required = true) String reciepe,
                                            @RequestParam(required = true) int weight,
                                            @RequestParam(required = true) int calories,
                                            @RequestParam(required = true) String info,
                                            @AuthenticationPrincipal User user){
        Reciepe rec = new Reciepe(name, reciepe, weight, calories, info, user);
        reciepeRepo.save(rec);
        return "redirect:/foodArray";
    }

Everything was saved and deleted from the page normally. Then I tried to add authorization/registration via Spring Security. Everything works, but it stopped saving recipes to the database, it gives an error 403 and no more information at all.

@Entity
public class User implements UserDetails {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String username;
    private String password;

    @Enumerated(EnumType.STRING)
    @ElementCollection(targetClass = Role.class, fetch = FetchType.EAGER)
    @CollectionTable(name = "roles")
    private Set<Role> roles = new HashSet<>();

    @Override
    public String getPassword() {
        return password;
    }
    @Override
    public String getUsername() {
        return username;
    }
    private Collection<? extends GrantedAuthority> getRoles() {
        return roles;
    }

    public void setUsername(String username) {
        this.username = username;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public void setRoles(Set<Role> roles) {
        this.roles = roles;
    }

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        return getRoles();
    }

    @Override
    public boolean isAccountNonExpired() {
        return true;
    }
    @Override
    public boolean isAccountNonLocked() {
        return true;
    }
    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }
    @Override
    public boolean isEnabled() {
        return true;
    }
}

@Controller
@RequestMapping("/registration")
public class RegistrationController {

    @Autowired
    private PasswordEncoder passwordEncoder;

    @Autowired
    private UserRepo userRepo;

    @GetMapping
    public String registration(){
        return "/registration";
    }

    @PostMapping
    public String processUser(RegistrationForm form){
        userRepo.save(form.toUser(passwordEncoder));
        return "redirect:/login";
    }
}

public class RegistrationForm {

    private String username;
    private String password;

    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

    public User toUser(PasswordEncoder passwordEncoder){
        User user = new User();
        user.setUsername(username);
        user.setPassword(passwordEncoder.encode(password));
        user.setRoles(Collections.singleton(Role.USER));
        return user;
    }
}