Operation did not succeed because the program cannot commit or quit a cell value change.

private void dataGridView1_KeyUp(object sender, KeyEventArgs e)
      {
          try
          {
              dataGridView1.Refresh();
             Console.WriteLine( dataGridView1.Rows.Count);
              int Secondrowindex = Convert.ToInt32(dataGridView1.CurrentRow.Index);
              int rowcounter = dataGridView1.Rows.Count;
              int asd = Convert.ToInt32(dataGridView1.CurrentCell.ColumnIndex);
              if (asd <= 3 && Secondrowindex == rowcounter - 1)
              {
                  if (e.KeyCode == Keys.Enter)
                  {
                      if (asd == 3)
                      {
                          dataGridView1.CurrentCell = dataGridView1[dataGridView1.CurrentCell.ColumnIndex - 2, dataGridView1.CurrentRow.Index];
                      }
                      else if (asd == null)
                      {
                      }
                      else
                      {
                          dataGridView1.EndEdit();
                          string asew = dataGridView1.EditMode.ToString();
                          dataGridView1.CurrentCell = dataGridView1[dataGridView1.CurrentCell.ColumnIndex + 1, dataGridView1.CurrentRow.Index];
                      }
                  }
              }
              else if (asd == 3 && rowcounter == Secondrowindex + 1)
              {
                  if (e.KeyCode == Keys.Enter)
                  {
                      dataGridView1.CurrentCell = dataGridView1[dataGridView1.CurrentCell.ColumnIndex, dataGridView1.CurrentCell.RowIndex + 1];
                  }
              }
              else
              {
              }
          }
          catch (Exception gf)
          {
             MessageBox.Show(gf.Message);
          }
      }