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 ('5fc8bc91cd0a40b1e31a8f39f9d68886', -1, 1714027926, 1714027926, '12bfd342', -4, 0, 0)

Line : 187
File : sessions.php