phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6940d0d717f7d3981e07a30e946506f0' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6940d0d717f7d3981e07a30e946506f0', -1, 1785163213, 1785163213, 'd849d917', -4, 0, 0)

Line : 187
File : sessions.php