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 ('c09f4fb3db6f97f7e834d9a21ba21dd5', -1, 1469877355, 1469877355, '6b161810', -1, 0, 0)

Line : 187
File : sessions.php