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 ('970c749a5a475e2728e2e4a39389a02d', -1, 1714733192, 1714733192, '12bf5420', -10, 0, 0)

Line : 187
File : sessions.php