Error near WHERE clause is coming.

protected void Button3_Click(object sender, EventArgs e) 
{     
    foreach(GridViewRow ro in GridView2.Rows)
    {
        foreach (GridViewRow row in GridView1.Rows)
        { 
            if (row.RowType == DataControlRowType.DataRow)
            {
                Label Role = (ro.Cells[1].FindControl("Role_Name") as Label);
                CheckBox chkAdd = (row.Cells[2].FindControl("CheckBox1") as CheckBox);
                CheckBox chkEdit = (row.Cells[2].FindControl("CheckBox2") as CheckBox); 
                CheckBox chkView = (row.Cells[2].FindControl("CheckBox3") as CheckBox); 
                CheckBox chkDelete = (row.Cells[2].FindControl("CheckBox4") as CheckBox); 
                string strID = row.Cells[0].Text; 
                string Pages = row.Cells[1].Text;
                string Role_Name = ro.Cells[2].Text;
                con.Open();
                string query = "Insert Into  Role1  ([Role_Name],[Add],[View],[Edit],[Delete]) values('"+Role_Name+"','"+(chkAdd.Checked== true?'Y':'N')+"','"+(chkView.Checked==true?'y':'N')+"' ,'"+(chkEdit.Checked==true?'y':'N')+"' ,'"+(chkDelete.Checked==true?'y':'N')+"') WHERE ID='" +strID + "' and Pages ='"+Pages+"'" ; 
                SqlCommand cmd = new SqlCommand(query, con); 
                cmd.ExecuteNonQuery(); 
                BindGrid();
                
                con.Close();
              
            } 
        }
    }
}