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: 804
name: THE BIRMINGHAM (LAND AT 539-561 CHESTER ROAD AND LAND AT FIRSHOLM CLOSE, BOLDMERE) TPO 1999
tree-preservation-order: undefined
TPO 804
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.838604 52.537994,-1.837775 52.538568,-1.837869 52.538642,-1.837875 52.538639,-1.837880 52.538657,-1.837917 52.538686,-1.837977 52.538656,-1.837995 52.538662,-1.838074 52.538724,-1.838101 52.538712,-1.838303 52.538880,-1.838337 52.538897,-1.838497 52.539057,-1.838692 52.539194,-1.838913 52.539032,-1.839085 52.538926,-1.839253 52.538782,-1.839243 52.538774,-1.839590 52.538511,-1.839560 52.538494,-1.839580 52.538481,-1.839367 52.538364,-1.839325 52.538354,-1.839112 52.538225,-1.838650 52.537984,-1.838623 52.537976,-1.838590 52.537986,-1.838604 52.537994)))
point: POINT (-1.838696 52.538562)
notes: The shaded area represents those properties which fall within the outline of a Tree Preservation Order. To precisely identify trees protected by the Order, you can request a copy of the tree preservation order at the following link.
organisation
entry-date: 2025-11-30
start-date
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.