The data at the Subscriber was validated against the data at the Publisher, and the data did not match; therefore validation failed. When you specified that validation should be performed, you selected the option that a subscription should be reinitialized if validation failed. Reinitializing a subscription involves applying a new snapshot at the Subscriber. For more information about validation, see Validating Replicated Data.
Data at the Publisher and Subscriber will match after the new snapshot is applied at the Subscriber. For information about how to determine why validation failed, see Data at the Publisher and Subscriber Do Not Match.