An unexpected error occurred.

mysql error: [3065: Expression #1 of ORDER BY clause is not in SELECT list, references column 'cbsadmi8_concrete.CV.cvDatePublic' which is not in SELECT list; this is incompatible with DISTINCT] in EXECUTE("SELECT DISTINCT YEAR(CV.cvDatePublic) AS year, MONTH(CV.cvDatePublic) AS month FROM CollectionVersions CV INNER JOIN CollectionSearchIndexAttributes SIA ON SIA.cID = CV.cID INNER JOIN Pages P ON P.cID = CV.cID WHERE P.cParentID = '126' AND CV.cvIsApproved = 1 AND (SIA.ak_exclude_page_list = 0 or SIA.ak_exclude_page_list is null) ORDER BY CV.cvDatePublic DESC")