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: tpo1735
name: Swanland No. 2 - 1974
tree-preservation-order: undefined
155
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-0.479836 53.738428,-0.480272 53.739226,-0.480547 53.739707,-0.480792 53.739638,-0.480694 53.739396,-0.482250 53.739187,-0.482195 53.739132,-0.482739 53.739055,-0.483272 53.738951,-0.483320 53.738782,-0.483719 53.738772,-0.483851 53.738698,-0.483792 53.738177,-0.484895 53.738190,-0.485007 53.738082,-0.485112 53.737965,-0.485738 53.738016,-0.485790 53.737578,-0.485436 53.737570,-0.485865 53.737228,-0.485237 53.737237,-0.484548 53.737282,-0.484092 53.737270,-0.483817 53.737232,-0.483535 53.737139,-0.483219 53.737203,-0.483057 53.737193,-0.483007 53.737168,-0.482971 53.737128,-0.482957 53.737070,-0.482876 53.737045,-0.482763 53.736986,-0.479001 53.736841,-0.479191 53.737242,-0.479836 53.738428)))
point: POINT (-0.482029 53.737976)
notes
entry-date: 1974-11-13
start-date: 1974-11-13
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.