Entry 'FlatFile TraceListener' has already been added error

I am using logging in my project to trace some error log Details. This is my Root Web.config setting.

<add fileName="C:\NET20Root\EIGRoot\Wedding\Tracing\WeddingEIG.Weddings.Trace.log" header="----------------------------------------" footer="----------------------------------------" formatter="Text Formatter" listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FlatFileTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FlatFileTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" name="FlatFile TraceListener"/>
<add fileName="C:\NET20Root\EIGRoot\Household\Tracing\HouseholdEIG.Household.Trace.log" header="----------------------------------------" footer="----------------------------------------" formatter="Text Formatter" listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FlatFileTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FlatFileTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" name="FlatFile TraceListener"/>

and facing this error

The entry 'FlatFile TraceListener' has already been added.

Can some one please help me on this what i am doing wrong??