Tree preservation zone

There is a problem

1000 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: ZZZZZSESRW435
name: The Bucks County Council (Eton Rural District) Tree Preservation Order No. 1; 1958; under S.28 of th
tree-preservation-order: undefined
TPO/BD/1958/01
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.691967 51.529864,-0.691906 51.529722,-0.691874 51.529664,-0.691849 51.529640,-0.691791 51.529507,-0.691798 51.529481,-0.691761 51.529279,-0.691763 51.529144,-0.691797 51.528953,-0.691729 51.528879,-0.691771 51.528868,-0.691798 51.528845,-0.691812 51.528498,-0.691791 51.528185,-0.691797 51.527772,-0.691811 51.527494,-0.691676 51.527341,-0.691665 51.527335,-0.690446 51.527437,-0.690461 51.527622,-0.690425 51.527737,-0.689016 51.527832,-0.689044 51.528122,-0.689094 51.528452,-0.689163 51.528683,-0.689227 51.528829,-0.689295 51.528959,-0.690289 51.528852,-0.690315 51.529155,-0.690479 51.529137,-0.690476 51.529129,-0.690727 51.529096,-0.690796 51.529109,-0.690829 51.529134,-0.690873 51.529151,-0.690884 51.529160,-0.690867 51.529218,-0.690902 51.529339,-0.690803 51.529349,-0.690771 51.529416,-0.690783 51.529476,-0.690740 51.529533,-0.690719 51.529603,-0.690711 51.529605,-0.690772 51.529761,-0.690868 51.529928,-0.690911 51.529988,-0.691025 51.529995,-0.691103 51.530010,-0.691949 51.529876,-0.691946 51.529867,-0.691967 51.529864)))
point: POINT (-0.690723 51.528519)
notes
organisation
entry-date: 2017-07-04
start-date: 2017-07-04
end-date

Your dataset is missing the tree-preservation-order column.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.