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 ('12f0b4dbaf6307775bed5e8db2910b05', -1, 1713445202, 1713445202, '0390749f', -4, 0, 0)

Line : 187
File : sessions.php