phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1194 Table '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 ('7c3e3b62b9836b52441b7a6f6f1ecb42', -1, 1417051471, 1417051471, '3651d8fe', -1, 0, 0)

Line : 172
File : sessions.php