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 ('3835eed1b0d50e3528c415dbbc8da073', -1, 1714149417, 1714149417, '03902394', 2, 0, 0)

Line : 187
File : sessions.php