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: ZZZZDVESXE420
name: The Chiltern District Council (Shenstone, Cokes Lane, Little Chalfont) Tree Preservation Order No 2
tree-preservation-order: undefined
TPO/1975/002
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.567456 51.664633,-0.567454 51.664637,-0.567400 51.664700,-0.567198 51.665045,-0.567187 51.665075,-0.567186 51.665085,-0.567075 51.665281,-0.567008 51.665391,-0.566862 51.665645,-0.566805 51.665746,-0.566785 51.665788,-0.566738 51.665872,-0.566991 51.666023,-0.567061 51.666063,-0.567219 51.666297,-0.567695 51.666175,-0.567749 51.666160,-0.567759 51.666155,-0.567808 51.666142,-0.567785 51.666123,-0.567794 51.666109,-0.567958 51.666032,-0.568025 51.665997,-0.568298 51.665844,-0.568476 51.665742,-0.568813 51.665559,-0.568912 51.665503,-0.568796 51.665414,-0.568540 51.665206,-0.568497 51.665157,-0.568432 51.665078,-0.568422 51.665068,-0.568413 51.665062,-0.568386 51.665052,-0.568326 51.665023,-0.568228 51.664968,-0.567735 51.664660,-0.567782 51.664609,-0.567601 51.664543,-0.567565 51.664523,-0.567553 51.664497,-0.567538 51.664493,-0.567456 51.664633)))
point: POINT (-0.567722 51.665472)
notes
entry-date: 2010-02-18
start-date: 2010-02-18
end-date

Your data is missing a tree-preservation-order.

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

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