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 ('04b4b87428264f27f0dd7b6bf2f5e7d4', -1, 1714020000, 1714020000, '030ef6fe', -8, 0, 0)

Line : 187
File : sessions.php