phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './rkskru_forum/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 ('215100d574249b43e8350cc8f5f25cbe', -1, 1438598067, 1438598067, '36904fc8', 27, 0, 0)

Line : 187
File : sessions.php