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 ('f0939cabc4a7856c32f34f0f1a8cf9a8', -1, 1713524824, 1713524824, '0a020003', 1, 0, 0)

Line : 187
File : sessions.php