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 ('11800259fa51d26b5c6e88e5f718aba5', -1, 1714007160, 1714007160, '038a71bc', -1, 0, 0)

Line : 187
File : sessions.php