phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c8534749ef7728ee635d4e408018b2bc', -1, 1715296690, 1715296690, '12e3727d', -7, 0, 0)

Line : 189
File : sessions.php