phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './twisty_phpb1/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 ('a4ff9c7f2d4b49e6c5f4d4857c219b2f', -1, 1513544970, 1513544970, '365acf4b', 2, 0, 0)

Line : 187
File : sessions.php