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: TPO268
name: 19/1987
tree-preservation-order: undefined
19/1987
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.636030 51.289140,0.636003 51.289159,0.636004 51.289177,0.635987 51.289197,0.635945 51.289220,0.635888 51.289216,0.635793 51.289165,0.635750 51.289160,0.634776 51.289274,0.634667 51.289249,0.634438 51.289173,0.633709 51.288967,0.633608 51.288893,0.633589 51.288871,0.633561 51.288634,0.633527 51.288512,0.633496 51.288428,0.633273 51.288003,0.633530 51.287901,0.634629 51.287674,0.635093 51.287591,0.635896 51.287464,0.636111 51.287447,0.636172 51.287569,0.636399 51.287852,0.636502 51.288032,0.636603 51.288244,0.636666 51.288491,0.636824 51.288922,0.636843 51.289028,0.636030 51.289140)))
point: POINT (0.635127 51.288406)
notes: The Maidstone Borough Council Tree Preservation Order No 19 of 1987 under Section 60 of the Town and Country Planning Act 1971 Woodlands - W18 Mixed Deciduous and Conifers consisting
organisation
entry-date: 1987-08-11
start-date: 1987-08-05
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.