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You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'and toon = 1 AND (art_Content.publicatiedatum='' OR art_Content.publicatiedat...' at line 1 SQL Query: SELECT id FROM art_Content WHERE ouder =  and toon = 1 AND (art_Content.publicatiedatum='' OR art_Content.publicatiedatum IS NULL OR art_Content.publicatiedatum<='20241121')
        AND (art_Content.expiratiedatum='' OR art_Content.expiratiedatum IS NULL OR art_Content.expiratiedatum>='20241121')
        AND (art_Content.thema_DEFAULT='1' OR art_Content.thema_uni='1')