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: TPO782
name: 13/1986
tree-preservation-order: undefined
13/1986
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.651389 51.267178,0.651390 51.267093,0.651380 51.267061,0.651108 51.266536,0.651091 51.266471,0.651068 51.266263,0.650999 51.266158,0.650962 51.266122,0.650470 51.265810,0.650288 51.265665,0.650209 51.265612,0.650263 51.265819,0.650264 51.265890,0.649980 51.265626,0.649834 51.265472,0.650160 51.265263,0.650216 51.265333,0.650306 51.265409,0.650425 51.265490,0.650858 51.265724,0.651014 51.265794,0.651182 51.265886,0.651302 51.265965,0.651363 51.266027,0.651420 51.266113,0.651458 51.266277,0.651505 51.266626,0.651546 51.266808,0.651610 51.267044,0.651677 51.267195,0.651348 51.267286,0.651379 51.267228,0.651389 51.267178)))
point: POINT (0.650927 51.266139)
notes: Maidstone Borough Council Tree Preservation Order No 13 of 1986 under Section 60 of the Town and Country Planning Act 1971 Woodlands - W5 Comprising : Mixed conifers and deciduous
organisation
entry-date: 1986-08-13
start-date: 1986-07-18
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.