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 ('b4281b21c0e55a9d4c41d211b56e5c3e', -1, 1484884289, 1484884289, '17172216', 14, 0, 0)

Line : 187
File : sessions.php