phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './umutiski_barsakforum/phpbb4_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb4_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('2685aac2ab61b24d5e50dbf5e9aa4d71', -1, 1425584915, 1425584915, '36a632d5', 21, 0, 0)

Line : 192
File : sessions.php