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 ('fc7913b75f66647ec85f7c19096fc4d2', -1, 1714098417, 1714098417, '038a6e77', -7, 0, 0)

Line : 187
File : sessions.php