phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '843b830b8cc27d1d58125c3f11cedf91' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('843b830b8cc27d1d58125c3f11cedf91', -1, 1771411854, 1771411854, 'd849d87b', 2, 0)

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