« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« Execution of a query to the database failed - Unknown column 'id' in 'field list' »
      SQL: SELECT id FROM malyar391_malyar.`modx_documentgroup` WHERE document = '2' LIMIT 1;
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Parser timing
  MySQL: 0,0004 s(1 Requests)
  PHP: 0,0049 s 
  Total: 0,0053 s