phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('2c8aba9bc1cd86dbd7ff7be9d1d5ffc0', -1, 1715219998, 1715219998, '031664b4', 2, 0, 0)

Line : 189
File : sessions.php