Errors

My logs are filled with the following message

2013-10-31 14:26:17 bc0 InnoDB: cannot calculate statistics for table “knowledge”.”wp_relevanssi_cache” because the .ibd file is missing. For help, please refer to https://dev.mysql.com/doc/refman/5.6/en/innodb-troubleshooting.html

Any idea what might be causing this?

https://www.ads-software.com/plugins/relevanssi/