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 ('8f7facd83a0b146d52b6b59575be8794', -1, 1429592492, 1429592492, '369de1e9', -1, 0, 0)

Line : 187
File : sessions.php