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: TPO264
name: 19/1987
tree-preservation-order: undefined
19/1987
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((0.631813 51.285586,0.631908 51.285752,0.631936 51.285913,0.631892 51.285937,0.631818 51.285955,0.631738 51.285939,0.631534 51.285575,0.631298 51.285255,0.631162 51.285121,0.631101 51.285075,0.631010 51.284934,0.630875 51.284799,0.630749 51.284690,0.630667 51.284544,0.630566 51.284411,0.630499 51.284274,0.630447 51.284204,0.630446 51.284152,0.630474 51.284098,0.630597 51.284071,0.630674 51.284104,0.630772 51.284206,0.631132 51.284685,0.631487 51.285071,0.631813 51.285586)))
point: POINT (0.631192 51.284969)
notes: The Maidstone Borough Council Tree Preservation Order No 19 of 1987 under Section 60 of the Town and Country Planning Act 1971 Group of Trees - G7 Consisting of 5 Oak and 1 Ash
organisation
entry-date: 1987-08-11
start-date: 1987-08-05
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.