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 ('6516fe80e6d02c5a22f33ad3212d7947', -1, 1713932420, 1713932420, '0390d491', -4, 0, 0)

Line : 187
File : sessions.php