phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './forum_members/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) VALUES ('aea03a0c4dbecbdac309a1b19237cca2', -1, 1464265903, 1464265903, '3651575e', -1, 0)

Line : 158
File : sessions.php