Application Error Handler Failed

The application Error Handler failed with an exception.

System.InvalidOperationException: Unable add log entry into table aspnet_ApplicationWebLog. String or binary data would be truncated.
The statement has been terminated.
   at Westwind.Utilities.Logging.SqlLogAdapter.WriteEntry(WebLogEntry entry)
   at Drumis.ECommerce.Website.Global.Application_Error(Object sender, EventArgs e)