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 ('a12b129629725afc277e15a019dde0a6', -1, 1498535096, 1498535096, '171484e3', 2, 0, 0)

Line : 187
File : sessions.php