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: TPO662
name: 3/1983
tree-preservation-order: undefined
3/1983
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((0.637120 51.279862,0.637201 51.279865,0.637291 51.279913,0.637319 51.279945,0.637353 51.280018,0.637378 51.280100,0.637370 51.280210,0.637332 51.280309,0.637205 51.280436,0.637127 51.280460,0.637039 51.280452,0.636938 51.280426,0.636848 51.280351,0.636806 51.280250,0.636805 51.280224,0.636837 51.280064,0.636852 51.280026,0.636919 51.279939,0.636976 51.279899,0.637047 51.279864,0.637120 51.279862)))
point: POINT (0.637094 51.280159)
notes: Maidstone Borough Council Tree Preservation Order No 3 of 1983 as varied by the Maidstone Borough Council Tree Preservation Order No.14 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.