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 ('259f35a63b71d71f8b98a2f578210038', -1, 1708799059, 1708799059, '03eb916c', -11, 0, 0)

Line : 187
File : sessions.php