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: TPO942
name: 3/1972
tree-preservation-order: undefined
3/1972
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.738899 51.249783,0.738954 51.249702,0.739131 51.249582,0.739180 51.249537,0.739908 51.249834,0.740420 51.250068,0.740678 51.250214,0.740930 51.250291,0.741063 51.250354,0.740722 51.250661,0.740660 51.250664,0.739899 51.250247,0.738899 51.249783)))
point: POINT (0.739999 51.250097)
notes: County of Kent (Hollingbourne Rural Area) Tree Preservation Order No 3 of 1972 under the provision of Section 29 of the Town and Country Planning Act 1962. Woodlands - W1 Mixed hardwoods consisting of
organisation
entry-date: 1974-03-17
start-date: 1972-03-23
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.