phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './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 ('35c5ba8b3ae1ab1121b8f757020c5b1c', -1, 1524610493, 1524610493, '369c25ae', 0, 0, 0)

Line : 187
File : sessions.php