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Continue to ChatMySQL, PHP and "Integrity constraint violation: 1062 Duplicate entry" https://mamchenkov.net/wordpress/2016/09/14/mysql-php-and-integrity-constraint-violation-1062-duplicate-entry/
MySQL, PHP and "Integrity constraint violation: 1062 Duplicate entry" https://mamchenkov.net/wordpress/2016/09/14/mysql-php-and-integrity-constraint-violation-1062-duplicate-entry/