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 ('88a5d4be847addf94ed9701d78cfd779', -1, 1714636875, 1714636875, '12dcb2cf', -10, 0, 0)

Line : 187
File : sessions.php