Additional information: This row already belongs to this table.

I'm developing a system that looks for information in an excel and does some processing to save the data in a DBF database. All the treatments I do are on top of DataTables, so I use dataRows and after a certain time, I'm facing many problems with the following error:

I've researched some solutions, but I've done a query between two dataTables.

var dtJoin = from dtOri in dbCons.getDataTable("\ArqDbf.DBF").AsEnumerable()
             join dtFKey in dbCons.getDataTable("\ArqDbf.DBF").AsEnumerable()
             on dtOri["prnt_ent"] equals dtFKey["org_ent_id"]
             select dtJoinOrg.LoadDataRow(new object[]
             {
                 dtOri["org_ent_id"],
                 dtOri["org_ent_nm"],
                 dtOri["org_en_des"],
                 dtOri["prnt_ent"],
                 dtFKey["org_ent_nm"],
                 dtFKey["org_en_des"]  
             },false);

dtOrgs.TableName = "Orgs";
foreach (DataRow drJoin in dtJoin)
{
    dtJoinOrg.Rows.Add(drJoin);
}

And at the point where I do the "dtJoinOrg.Rows.Add" it gives this error, but where does the dataRow bind to a dataTable? How can I resolve this problem?

About dataRow belonging to a dataTable, I've created the following workaround:

/*
    Nesse caso o pDtClone tem a mesma estrutura do pDtOri. 
    Caso alguem se pergunte por que estou fazendo isso, 
    é que há um tratamento durante a execução em que poderei alterar as 
    informações do pDtClone e depois vou comparar com o pDtOri
*/
DataRow[] drResult = pDtOri.Select(vWhere);

if (drResult.Length > 0)
{
    for (int i = 0; i < drResult.Length; i++)
    {
        DataRow drNew = pDtClone.NewRow();
        try
        {
            int vColIndex = 0;
            foreach (object vValue in drResult[0].ItemArray)
            {
                drNew[vColIndex] = vValue;
                vColIndex++;
            }
            pDtClone.Rows.Add(drNew);
        }
        finally
        {
            drNew = null;
        }
    }
}

This is a solution I have found so far, but I would like to see other solutions.