WordPress database error: [Key column 'system' doesn't exist in table]
ALTER TABLE comp_nextend2_section_storage ADD INDEX `system` (`system`)

WordPress database error: [Unknown column 'system' in 'field list']
SELECT `id`, `referencekey`, `value`, `system`, `editable` FROM comp_nextend2_section_storage WHERE `application` = 'smartslider' AND `section` = 'settings' AND `referencekey` = ''

WordPress database error: [Unknown column 'system' in 'field list']
INSERT INTO `comp_nextend2_section_storage` (`application`, `section`, `referencekey`, `value`, `system`, `editable`) VALUES ('smartslider', 'settings', '', '{\"n2_ss3_version\":\"3.5.1.1\\/b:release-3.5.1.1\\/r:af21758e4195aac8cb3e9ec0beb7b0526d08b3a0\"}', '0', '1')