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 ('c40b0cd1e4d4b4ab0711d8d4a557a429', -1, 1728962023, 1728962023, '23ad3012', -10, 0, 0)

Line : 172
File : sessions.php