phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './exponenta_forum/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 ('ee2fdd1dc672259c240f840bad3fc1ad', -1, 1508581790, 1508581790, '3651b299', -1, 0, 0)

Line : 190
File : sessions.php