« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« Execution of a query to the database failed - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') ORDER BY `value` ASC' at line 1 »
      SQL: SELECT DISTINCT `value` FROM `modx_site_tmplvar_contentvalues` WHERE `tmplvarid` = 36 AND `contentid` IN ( ) ORDER BY `value` ASC
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Parser timing
  MySQL: 0.0109 s(23 Requests)
  PHP: 0.2784 s 
  Total: 0.2893 s