phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b4b66bae8d284b0689868f4e760aeb2f', -1, 1713977308, 1713977308, '038a71bc', 0, 0, 0)

Line : 187
File : sessions.php