phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '873da11bc7f6cc2d11712df0a5393dc7' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('873da11bc7f6cc2d11712df0a5393dc7', -1, 1771015204, 1771015204, 'd849d87b', 7, 0)

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