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 ('6a96b6b107300bb12670c5c0237b9d99', -1, 1713870482, 1713870482, '031196a3', 3, 0, 0)

Line : 187
File : sessions.php