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 ('a43c95e1daa03c182d4cf4d1b0cd1a56', -1, 1714030417, 1714030417, '12dc89a4', -8, 0, 0)

Line : 187
File : sessions.php