phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ff90c1fec77821b1e57ac1134335c558' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('ff90c1fec77821b1e57ac1134335c558', -1, 1770515496, 1770515496, 'd849d802', 7, 0)

Line : 180
File : /www/includes/sessions.php