phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './forumcr/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 ('c4f24bb59d7fb32a4ce6de05a2599aa0', -1, 1425487266, 1425487266, '36c581f2', 20, 0, 0)

Line : 187
File : sessions.php