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 ('a7bd2c76c2e8922be51d050ef291bb25', -1, 1503351836, 1503351836, '36e12f7c', -1, 0, 0)

Line : 172
File : sessions.php