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 ('0ee1ef8319d853f7f81b8e1fa4ffaf6f', -1, 1713501417, 1713501417, '03913aa9', 6, 0, 0)

Line : 187
File : sessions.php