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 ('8738f37248b8e689ebf4c84c15d03c78', -1, 1430904619, 1430904619, '3690feae', 14, 0, 0)

Line : 187
File : sessions.php