jos-Error: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation '=' of the following query : SELECT `tbl`.* , CONCAT_WS('T',`date`,`start_time`) AS `start` , CONCAT_WS('T',`end_date`,`end_time`) AS `end` FROM `tw7oe_ohanah_events` AS `tbl` WHERE `tbl`.`slug` IN ( '‘challenges-of-the-changing-market-place’-barry-horne' ) ORDER BY `date` ASC , `start_time` ASC