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: TPO638
name: 10/1983
tree-preservation-order: undefined
10/1983
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.610085 51.268867,0.609615 51.269181,0.609338 51.269345,0.609203 51.269464,0.609067 51.269558,0.608872 51.269658,0.608642 51.269801,0.608250 51.269973,0.608021 51.269719,0.608032 51.269717,0.607966 51.269646,0.607704 51.269450,0.607410 51.269205,0.607345 51.269200,0.607235 51.269238,0.607085 51.269267,0.606982 51.269282,0.606877 51.269287,0.606808 51.269278,0.606786 51.269246,0.606776 51.269192,0.607387 51.269059,0.608014 51.268895,0.608741 51.268735,0.609334 51.268610,0.609919 51.268515,0.610085 51.268867)))
point: POINT (0.608653 51.26917)
notes: Maidstone Borough Council Tree Preservation Order No 10 of 1983 as varied by the Maidstone Borough Council Tree Preservation Order No.19 of 1988 made under Section 60 of the Town and Country Planning Act 1971
organisation
entry-date: 1988-11-05
start-date: 1988-10-14
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.