phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './ultimate/phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1918b54fc6f0b0ea61a1fc02c88a30de', -1, 1555733678, 1555733678, '12e893d7', 0, 0, 0)

Line : 187
File : sessions.php