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: TPO658
name: 16/1986
tree-preservation-order: undefined
16/1986
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((0.664593 51.274528,0.664626 51.274536,0.664694 51.274572,0.664818 51.274672,0.664960 51.274761,0.665074 51.274847,0.665166 51.274896,0.665563 51.275144,0.665760 51.275256,0.666360 51.275646,0.666695 51.275879,0.666867 51.275975,0.667426 51.276321,0.667559 51.276408,0.667661 51.276507,0.667702 51.276533,0.667751 51.276547,0.667770 51.276567,0.667765 51.276582,0.667747 51.276601,0.667706 51.276624,0.667665 51.276634,0.667609 51.276665,0.667485 51.276605,0.667098 51.276313,0.666540 51.275967,0.665988 51.275590,0.665862 51.275507,0.665801 51.275477,0.665708 51.275397,0.665598 51.275324,0.665469 51.275244,0.665326 51.275168,0.665203 51.275084,0.665064 51.275003,0.664925 51.274929,0.664745 51.274846,0.664609 51.274745,0.664441 51.274665,0.664480 51.274609,0.664564 51.274542,0.664593 51.274528)))
point: POINT (0.666141 51.275608)
notes: Maidstone Borough Council Tree Preservation Order No 16 of 1986 under Section 60 of the Town and Country Planning Act 1971 Group of Trees - G1 comprising of 1 Sycamore, 3 Ash,
organisation
entry-date: 1986-08-13
start-date: 1986-07-19
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.