« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« Execution of a query to the database failed - Table './krings_kringsmodx/modx_site_content' is marked as crashed and should be repaired »
      SQL: SELECT sc.* FROM `krings_kringsmodx`.`modx_site_content` sc LEFT JOIN `krings_kringsmodx`.`modx_document_groups` dg ON dg.document = sc.id WHERE sc.id = '' AND (sc.privateweb=0) LIMIT 1;
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Parser timing
  MySQL: 0.0030 s(0 Requests)
  PHP: 0.0194 s 
  Total: 0.0225 s