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 ('cdabc50625c283ce75d7d3dff4f3d5a2', -1, 1712923437, 1712923437, '2cc96100', -8, 0, 0)

Line : 187
File : sessions.php