❔ Decoded bitmap images aren't set in the photoboxes correctly

private void BTN_Save_Click(object sender, EventArgs e)
        {
            string DBpath = @"Data Source=.\StudentDB.db;Version=3;";
            Bitmap[] PictureBoxesBitmaps = {FirstPictureBitmap, SecondPictureBitmap, ThirdPictureBitmap };
            using SQLiteConnection connection = new(DBpath);
            using SQLiteCommand cmd = new(DBpath, connection);
            connection.Open();
            cmd.CommandText = @"DELETE FROM PictureBoxes";
            cmd.ExecuteNonQuery();
            foreach (Bitmap bitmap in PictureBoxesBitmaps)
            {
                System.IO.MemoryStream ms = new();
                bitmap?.Save(ms, ImageFormat.Png);
                byte[] BitmapByteArray = ms.ToArray();
                var PictureBox64 = Convert.ToBase64String(BitmapByteArray);
                cmd.CommandText = @"INSERT INTO PictureBoxes(Encoded) VALUES('" + PictureBox64 + "')";
                cmd.ExecuteNonQuery();
            }
            connection.Close();
        }