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 ('42d14c661efbe4a7cf1060db1a4f6094', -1, 1713512320, 1713512320, '039342b2', -8, 0, 0)

Line : 187
File : sessions.php