Updating datatable/datagridview to a DIFFERENT/existing table

Question

 Public Class Form1
   Dim dt As New DataTable
   Dim dt1 As New DataTable
   Dim connStr As String = "Provider = Microsoft.ACE.OLEDB.12.0; Data Source = test.ACCDB" 
   Private sqlStr1 = "SELECT * FROM Customer"
   Private sqlStr2 = "SELECT * FROM Test" 

Private Sub Load(...) Handles Button1.Click
   Dim dataAdapter As New OleDb.OleDbDataAdapter(sqlStr1, connStr)
   dataAdapter.Fill(dt)
   DataGridView1.DataSource = dt
End Sub 

Private Sub Move(...) Handles Button2.Click
   dt1 = dt.Copy
   DataGridView2.DataSource = dt1
End Sub 

Private Sub Update(...) Handles Button3.Click
   Dim dataAdapter As New OleDb.OleDbDataAdapter(sqlStr2, connStr)
   Dim commandbuilder As New OleDb.OleDbCommandBuilder(dataAdapter)
   dataAdapter.Update(dt1)
End Sub 

End Class 

All,
What I am trying to do is pull info from a table into my datagridview1 (which is fine). Then I want to move that info to datagridview2, then use the update method to move the information from dgv2 back to access into a DIFFERENT table. 
The error when I delete a record from dgv2 and proceed to update: "Concurrency violation: the DeleteCommand affected 0 of the expected 1 records."
.

Any help is appreciated.
Thank you,
Ashley