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 ('309ff9f00e934ab41b7a342baee76603', -1, 1418846052, 1418846052, '36e288b3', -4, 0, 0)

Line : 187
File : sessions.php