calling a method on the main form from a usercontrol in a WinForm

I have a uercontrol - in that usercontrol I want to can a meathod to initiate the repeater control
int the user control i am calling the main page and the meathod
 MainView mv = FindForm() as MainView;
                    if (mv != null)
                        mv.ButtonRepeater();

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in the main page I am calling the repeater
        internal void ButtonRepeater(object sender, EventArgs e)
        {
            ButtonRepeater();
        }

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and when it runs I get an error - the error is "This causes two bindings in the collection to bind to the same property.
Parameter name: binding"

        public void ButtonRepeater()
        {
            if (DesignMode == false)
            {
                radLabel3.Text = "";
                dataRepeater1.DataSource = null;
                BindingSource bindingSource1 = null;
                DataTable dt = null;
                string sqlStr = "";
                string sqlCon = ConfigurationManager.ConnectionStrings["ViewCon"].ToString();
                sqlStr += " SELECT  id, TaskUID, Factory, ItemNumber, ItemName, ExFactoryDate, Customer, ReportDate, InspectorName, BatchCode, OverallResultChina, OverallResultDallas, ";
                sqlStr += " IsDupro, IsFinalRandomInsp, IsTestSamplePull, Uploaded, Downloaded, PDS_CC, WorkmanShip, OnSiteTest, BarcodeVer, Packaging, Packing, Lbl_Print_Mrkg, ";
                sqlStr += " ShipRemarks, IsCOmplete "; 
                sqlStr += " FROM         QC_Inspection ";
                sqlStr += " WHERE     (IsCOmplete IS NULL or IsCOmplete = 0 ) ";
                using(SqlConnection conn = new SqlConnection(sqlCon))
                using(SqlCommand cmd = new SqlCommand(sqlStr,conn))
                {
                    cmd.CommandType = CommandType.Text;
                    cmd.Connection.Open();
                    SqlDataAdapter da = new SqlDataAdapter(cmd);
                    dt = new DataTable();
                    da.Fill(dt);
                    bindingSource1 = new BindingSource();
                    bindingSource1.DataSource = dt;
                    radLabel2.Text = "QC Inspection";
                    radLabel3.DataBindings.Add("Text", bindingSource1, "TaskUID");<<<Error<<<<<
                    radLabel4.DataBindings.Add("Text", bindingSource1, "Factory");
                    dataRepeater1.DataSource = bindingSource1;
                    
                }
            }
        }

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I am not getting why there is this error
LVL 6
r3nderAsked:
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r3nderConnect With a Mentor Author Commented:
figured it out
radlabel3.Bindings.Clear();
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