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 ('d2a868fcd0381ec3f96b93a405a8212b', -1, 1711655153, 1711655153, '03ef3957', -7, 0, 0)

Line : 187
File : sessions.php