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 ('08e4555e53184b5045054fd0f31859d9', -1, 1711725117, 1711725117, '365aa749', -4, 0, 0)

Line : 187
File : sessions.php