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: ZZZZDVESXE730
name: The Bucks County Council (Amersham Rural District) Tree Preservation Order No 8 - 1949 Confirmed by
tree-preservation-order: undefined
TPO/1949/008
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.597254 51.663020,-0.596874 51.662734,-0.596797 51.662706,-0.596444 51.662931,-0.596605 51.663028,-0.596626 51.663053,-0.596624 51.663061,-0.596187 51.663904,-0.596073 51.664147,-0.595861 51.664512,-0.595790 51.664670,-0.595742 51.664817,-0.595572 51.665106,-0.595485 51.665370,-0.595460 51.665422,-0.595437 51.665782,-0.595387 51.665893,-0.595283 51.666081,-0.595072 51.666426,-0.594890 51.666757,-0.594578 51.667290,-0.594565 51.667338,-0.594571 51.667352,-0.594778 51.667445,-0.595000 51.667557,-0.595238 51.667619,-0.595495 51.667003,-0.595914 51.666055,-0.595995 51.665878,-0.596114 51.665677,-0.596156 51.665588,-0.596172 51.665552,-0.596149 51.665545,-0.596235 51.665410,-0.596320 51.665171,-0.596673 51.664459,-0.596771 51.664311,-0.596876 51.664111,-0.597138 51.663443,-0.597200 51.663180,-0.597254 51.663020)))
point: POINT (-0.595977 51.665157)
notes
organisation
entry-date: 2010-02-18
start-date: 2010-02-18
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.