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 ('7cc907b73e38335d8bd1f6df89438d6f', -1, 1713505431, 1713505431, '340edd71', -2, 0, 0)

Line : 187
File : sessions.php