phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './forumcapes/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 ('aa1f61f1743b047f40034faf03215e9d', -1, 1547843580, 1547843580, '0354ba7a', -4, 0, 0)

Line : 187
File : sessions.php