Error SQL You have an error in your SQL syntax; MariaDB server

JInstaller: :Install: Error SQL 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 ') ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 DEFAULT COLLATE=utf8mb4_unicode_ci' at line 25

Extension Install: SQL error processing query: DB function failed with error number 1064
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 ') ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 DEFAULT COLLATE=utf8mb4_unicode_ci' at line 25
SQL =

CREATE TABLE IF NOT EXISTS  `#__answers_users` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `signature` TEXT NULL DEFAULT NULL,
  `questions` int(10) unsigned NOT NULL DEFAULT '0',
  `answers` int(10) unsigned NOT NULL DEFAULT '0',
  `accepted` int(10) unsigned NOT NULL DEFAULT '0',
  `best_answers` int(10) unsigned NOT NULL DEFAULT '0',
  `question_likes` int(10) NOT NULL DEFAULT '0',
  `question_dislikes` int(10) NOT NULL DEFAULT '0',
  `answer_likes` int(10) NOT NULL DEFAULT '0',
  `answer_dislikes` int(10) NOT NULL DEFAULT '0',
  `questions_liked` int(10) NOT NULL DEFAULT '0',
  `questions_disliked` int(10) NOT NULL DEFAULT '0',
  `answers_liked` int(10) NOT NULL DEFAULT '0',
  `answers_disliked` int(10) NOT NULL DEFAULT '0',
  `karma` int(10) unsigned NOT NULL DEFAULT '0',
  `last_visit` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  `current_visit` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  `session_data` text NOT NULL,
  `subid` varchar(12) DEFAULT NULL,
  `current_access_date` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  `last_access_date` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
  PRIMARY KEY (`id`),
  KEY `idx_answers_users_karma` (`karma`),
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 DEFAULT COLLATE=utf8mb4_unicode_ci;