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sql server variable names already declared in vb.net

Last Modified: 2016-07-19
I have made this for loop that works ok and grabs the data i need.

within the loop it wont update the table as it says variables already declared, it says this whatever I rename them too:

not sure what to do about that error.

 For Each drAccessRecord As DataRow In dtRecordsFromAccessSmmt.Rows ' each smmt veh cat record


                    cmdInsertSmmt.CommandText = "UPDATE dbo.TblWords SET VehCategory = @VehCategory WHERE ClientCode = @ClientCode "

                    cmdInsertSmmt.Parameters.AddWithValue("@ClientCode", drAccessRecord("MVRIS CODE"))
                    cmdInsertSmmt.Parameters.AddWithValue("@VehCategory", drAccessRecord("Vehicle Category Code"))


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