phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './grom_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 ('d00c399ab6f77a4e4505247f7e41d07c', -1, 1484635554, 1484635554, '36cc8ace', 33, 0, 0)

Line : 189
File : sessions.php