phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpbb/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 ('da0f86864bcb9a9568c4516b5d8534ba', -1, 1490653366, 1490653366, '36a64d20', -1, 0, 0)

Line : 187
File : sessions.php