Laravel - Gagal ganti password

Tiap kali klik update pasti munculnya "Pass tidak boleh sama". Padahal passnya sudah beda.

Controller

$rules = [
            'nama_unit_id' => 'required',
            'username' => 'required|max:100',
            'email' => 'required|email:rfc',
            'password' => 'required'
        ];

if (!Hash::check($request->input('password'), auth()->user()->password)) {
        return back()->with('error', 'Password tidak boleh sama!');
}

        $validatedData['password'] = Hash::make($request->input('password'));