SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'asdf' for key 'user_username_unique' (SQL: update `user` set `username` = asdf

This works on create/store but not on edit/update. I want the user to be updated and the data already exists in the database, the validation error appears. like this in the user store, I added the data, and it worked, even if there was already the same data then a validation error appeared, but in a different update if I update only the address then the old username data is still used and if I change the username it also works but it doesn't if I replace the username with an existing username the validation error does not appear and instead displays the following error. please help me i am still a student!

Error

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'asdf' for key 'user_username_unique' (SQL: update `user` set `username` = asdf, `password` = $2y$10$BYdDToN5jCCuRLdZx70YA.BFgyVIWulL8n/bv5C3VxOVCw6WBN.kO, `kota_id` = 1505, `kecamatan_id` = 1505013, `desa_id` = 1505013004, `user`.`updated_at` = 2022-04-09 14:25:03 where `id` = 4)

User Migration

Schema::create('user', function (Blueprint $table) {
                $table->bigIncrements('id');
                $table->string('nik')->unique()->nullable();
                $table->string('nama')->nullable();
                $table->string('telp')->unique()->nullable();
                $table->string('email')->unique();
                $table->timestamp('email_verified_at')->nullable();
                $table->string('foto')->nullable();
                $table->string('username')->unique();
                $table->string('password');
                $table->enum('level', ['user','admin'])->default('user');
                $table->unsignedBigInteger('provinsi_id')->nullable();
                $table->unsignedBigInteger('kota_id')->nullable();
                $table->unsignedBigInteger('kecamatan_id')->nullable();
                $table->unsignedBigInteger('desa_id')->nullable();
                $table->text('alamat')->nullable();
                $table->rememberToken();
                $table->timestamps();
            });

User Controller Store

  public function store(Request $request)
    {
           $validasi = $request->validate([
               'username' => ['required', 'string', 'min:3', 'max:30', 'unique:user'],
               'email' => ['required', 'email', 'string', 'max:255', 'unique:user'],
               'password' => ['required', 'string', 'min:8'],
               'nama' => ['required', 'string', 'min:3', 'max:50'],
               'nik' => ['required', 'string', 'min:16', 'max:16', 'unique:user'],
               'telp' => ['required', 'string', 'min:12', 'max:13', 'unique:user'],
               'provinsi_id' => ['required'],
               'kota_id' => ['required'],
               'kecamatan_id' => ['required'],
               'desa_id' => ['required'],
               'foto' => ['mimes:jpeg,jpg,png'],
               'level' => ['required'],
               'alamat' => ['required'],
           ]);
           $validasi['password'] = Hash::make('password');
           $create = User::create($validasi);
           if($request->hasFile('foto')){
               $request->file('foto')->move('images/',$request->file('foto')->getClientOriginalName());
               $create->foto = $request->file('foto')->getClientOriginalName();
               $create->save();
            }

           return redirect()->route('user.index');
    }

User Controller Update

public function update(Request $request, $id)
        {
            $user = User::find($id);
            $validasi = $request->validate([
                'username' => ['required', 'string', 'min:3', 'max:30', 'unique:user,id'],
                'email' => ['required', 'email', 'string', 'max:255', 'unique:user,id'],
                'password' => ['required', 'string', 'min:8', 'max:20'],
                'nama' => ['required', 'string', 'min:3', 'max:50'],
                'nik' => ['required', 'string', 'min:16', 'max:16', 'unique:user,id'],
                'telp' => ['required', 'string', 'min:12', 'max:13', 'unique:user,id'],
                'provinsi_id' => ['required'],
                'kota_id' => ['required'],
                'kecamatan_id' => ['required'],
                'desa_id' => ['required'],
                'foto' => ['mimes:jpeg,jpg,png'],
                'level' => ['required'],
                'alamat' => ['required'],
            ]);
            $validasi['password'] = Hash::make('password');
            $user->update($validasi);
            if($request->hasFile('foto')){
                $request->file('foto')->move('images/',$request->file('foto')->getClientOriginalName());
                $user->foto = $request->file('foto')->getClientOriginalName();
                $user->save();
             }
    
            return redirect()->route('user.index');
        }

via Chebli Mohamed