phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './forum/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 ('f164d3552db3d0bfeefc86c02ac94660', -1, 1513284869, 1513284869, '365270c1', 0, 0, 0)

Line : 189
File : sessions.php