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: ZZZZZXESRW177
name: South Bucks District Council (No. 31) Tree Preservation Order 1995; dated 31/5/95; made under Sectio
tree-preservation-order: undefined
TPO/SBDC/1995/31
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.563959 51.580012,-0.564261 51.579964,-0.565165 51.579861,-0.565267 51.579787,-0.565330 51.579718,-0.565425 51.579637,-0.565746 51.579456,-0.566044 51.579316,-0.566124 51.579262,-0.566224 51.579163,-0.566267 51.579105,-0.566338 51.578983,-0.566390 51.578848,-0.566496 51.578470,-0.566551 51.578400,-0.566630 51.578344,-0.566496 51.578233,-0.566020 51.577548,-0.565370 51.578977,-0.563958 51.579562,-0.563602 51.579368,-0.563722 51.579293,-0.563738 51.579191,-0.563829 51.579129,-0.563911 51.579158,-0.564229 51.578793,-0.564158 51.578688,-0.563377 51.578412,-0.563164 51.578436,-0.561709 51.579905,-0.560707 51.580900,-0.560714 51.580934,-0.561875 51.581362,-0.561959 51.581372,-0.562019 51.581362,-0.562103 51.581318,-0.562131 51.581295,-0.562381 51.581034,-0.562593 51.580845,-0.563260 51.580370,-0.563603 51.580137,-0.563748 51.580073,-0.563959 51.580012)))
point: POINT (-0.563535 51.579645)
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.