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: TPO728
name: 2/1969
tree-preservation-order: undefined
2/1969
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.561458 51.300040,0.562789 51.299416,0.563973 51.298848,0.565223 51.298274,0.564420 51.297563,0.564020 51.297198,0.561984 51.295414,0.561572 51.295620,0.561438 51.295698,0.560471 51.296335,0.560235 51.296509,0.560122 51.296349,0.560474 51.296096,0.561460 51.295482,0.561834 51.295302,0.561944 51.295263,0.562096 51.295415,0.562211 51.295372,0.562385 51.295543,0.562612 51.295456,0.562742 51.295630,0.562892 51.295801,0.563505 51.296396,0.563917 51.296771,0.563919 51.296841,0.564015 51.296926,0.564099 51.296945,0.564263 51.297069,0.564280 51.297102,0.564825 51.297567,0.565039 51.297766,0.565179 51.297878,0.565456 51.298064,0.565282 51.298396,0.564669 51.298666,0.564003 51.298946,0.563397 51.299238,0.562585 51.299677,0.562318 51.299847,0.562183 51.299951,0.561739 51.300266,0.561458 51.300040)))
point: POINT (0.563076 51.297355)
notes: County of Kent (Hollingbourne Rural District) Tree Preservation Order No 2, 1969 relating to trees and woodland at Harpole Farm, Detling Woodlands - W1 Beech standards over mixed
organisation
entry-date: 1969-05-19
start-date: 1969-05-12
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.