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 ('9ee36485ae585696a1e55a0e97c5d849', -1, 1713551563, 1713551563, '0395fb9a', -9, 0, 0)

Line : 187
File : sessions.php