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 ('f84f1c2140c92cb57d9d3cb7f2631cf7', -1, 1467141206, 1467141206, '369ec2a9', -9, 0, 0)

Line : 187
File : sessions.php