phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './shelter/phpbb_sessions' is marked as crashed and last (automatic?) repair failed

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('5db676fe93396b71552bc45e12dbefa9', -1, 1469455007, 1469455007, '36e10d3a', 0, 0, 0)

Line : 187
File : sessions.php