« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« Execution of a query to the database failed - Table './netprev_lambton/modx_site_content' is marked as crashed and should be repaired »
      SQL: SELECT sc.parent FROM `netprev_lambton`.modx_site_content sc LEFT JOIN `netprev_lambton`.modx_document_groups dg on dg.document = sc.id WHERE (sc.id=1 ) AND (sc.privateweb=0) LIMIT 1
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Parser timing
  MySQL: 0.0035 s s(0 Requests)
  PHP: 0.3040 s s 
  Total: 0.3075 s s