The last sold date and price are incorrect on my home on Zillow. How do I fix it?

The Zillow entry for my home's Last Sold field is incorrect. The current Last Sold value is Sep 2003 for $262,000. I purchased the home in March 2011 for $214,900. How do I get Zillow to correct the field?  Here's the Zillow link:

http://www.zillow.com/homedetails/1520-Swallow-Way-Roseville-CA-95661/17679292_zpid/
  • July 13 2012 - Roseville
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