Run CheckDB with the Data_Purity option. For Resolving the error, see the section in this article on data purity errors and the kb article it links to.
http://www.sqlservercentral.com/articles/65804/
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability