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 ('3e1b9e2b0d0a3b9ec0734b41cb1ebe35', -1, 1711667127, 1711667127, '12ea379a', -4, 0, 0)

Line : 187
File : sessions.php