phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpBB/phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6f7d58e9b105a4f1a217fd375d31c41e', -1, 1505976387, 1505976387, '36c63a3e', -4, 0, 0)

Line : 187
File : sessions.php