phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './db_morepc/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 ('5a1b5f3963535fbde0b346935463ff42', -1, 1495796364, 1495796364, '36a7dbc9', 0, 0)

Line : 158
File : sessions.php