phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './c2_childhood/phpbb_sessions' is marked as crashed and last (automatic?) repair failed

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, UserAgent, session_admin, SearchBot) VALUES ('ddb6e5d9e9b93c64716a9997032df678', -1, 1498670796, 1498670796, '36502a90', 0, 0, 'CCBot/2.0 (http://commoncrawl.org/faq/)', 0, 'CCBot/2.0 (http://commoncrawl.org/faq/)')

Line : 187
File : sessions.php