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 ('d4294ae9dac59b3e0bf26371f2dc02e6', -1, 1714018951, 1714018951, '03850cac', -10, 0, 0)

Line : 187
File : sessions.php