VB.NET Concurrency Exception with DataGridView - vb.net

Question

I have encountered a with my datagridview, I bound it to a datatable and am calling and the handler on row is as follows
Dim cmdBuild As New SqlCommandBuilder(sda)
sda.Update(dgv.DataSource)
sda is SqlDataAdapter
so the problem is it works fine, any changes are updated to the database, but the concurrency exception pops up and I understand it is due to updating a ghost row in the database, now what I don't know is how do I go about it, how do I prevent it from happening. spent a lot of time on this one thing so any help that will sort me out will be HIGHLY appreciated. Thanks in advance.
P.S. If more code is needed I'll post it.
Edit
Public Sub editUsers(ByRef mainPanel As CustomTabControl, ByRef dt As System.Data.DataTable)
For i As Integer = 0 To mainPanel.TabCount - 1
If mainPanel.TabPages(i).Text = "Excel users" Then
mainPanel.SelectedTab = mainPanel.TabPages(i)
Exit Sub
End If
Next
Dim tb As New TabPage("Excel users")
Dim datagrid As New DataGridView
datagrid.AllowUserToAddRows = False
dt.Rows.Add(dt.NewRow)
datagrid.DataSource = dt
AddHandler datagrid.RowLeave, AddressOf Home.dataUpdate
tb.Controls.Add(datagrid)
datagrid.Dock = DockStyle.Fill
mainPanel.TabPages.Add(tb)
mainPanel.SelectedTab = tb
datagrid.Columns("ID").Visible = False
datagrid.Columns("Username").AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill
datagrid.Columns("Username").FillWeight = 45
datagrid.Columns("Password").AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill
datagrid.Columns("Password").FillWeight = 45
End Sub
Public Sub dataUpdate()
Dim dgv As DataGridView = Nothing
For i As Integer = 0 To mainPanel.TabCount - 1
If mainPanel.TabPages(i).Text = "Excel users" Then
dgv = mainPanel.TabPages(i).Controls(0)
End If
Next
If IsNothing(dgv) Then
Exit Sub
End If
For i As Integer = dgv.DataSource.Rows.Count - 1 To 0 Step -1
If dgv.DataSource.Rows(i).RowState = DataRowState.Deleted Then
Continue For
End If
If IsDBNull(dgv.DataSource.Rows(i).Item(1)) Or IsDBNull(dgv.DataSource.Rows(i).Item(2)) Then
Exit Sub
End If
Next
Dim cmdBuild As New SqlCommandBuilder(sda)
sda.Update(dgv.DataSource)
dgv.DataSource.Rows.Add(dtt.NewRow)
End Sub
The code above is all the code that is involved with datagridview control