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 ('7b8266ba44a9781cef8e78f1e2634677', -1, 1713296638, 1713296638, '12dbec3e', 5, 0, 0)

Line : 187
File : sessions.php