phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './web182@002da@002dphpbb@002d5/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 ('c8c1a4e6227fae3feccf8d08a6555d55', -1, 1455164245, 1455164245, '36c4d92b', -4, 0, 0)

Line : 187
File : sessions.php