VB.net Concurrency Violation when trying to update a SQL table dynamically

Hi

I use the following code to dynamically edit a SQL table in a Windows Form DataGridView.
Most of the time things work but around one out of every 5 times I get the error shown in the image below.
Why would this be? Is there a better way to dynamically update a SQL table based on changes made by the user?

    Sub oDynamic_SQL_Save()
        Try

            Dim builder As New SqlCommandBuilder(dbadp2)

            builder.QuotePrefix = "["
            builder.QuoteSuffix = "]"

            dbadp2.UpdateCommand = builder.GetUpdateCommand()

            dbadp2.Update(dTable2)
            dTable2.AcceptChanges()

        Catch ex As Exception
            MsgBox(Err.Description & " mmm")
        End Try
    End Sub

Select allOpen in new window