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: ZZZZDVESXE772
name: The Urban District of Chesham Interim Preservation Order No 1 Approved by Minister of Town and Count
tree-preservation-order: undefined
TPO/1948/077
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.609703 51.705702,-0.609805 51.705728,-0.609999 51.705467,-0.610129 51.705267,-0.610224 51.705115,-0.610338 51.704893,-0.610378 51.704809,-0.610396 51.704766,-0.610429 51.704677,-0.610454 51.704586,-0.610473 51.704496,-0.610510 51.704283,-0.610522 51.704155,-0.610523 51.704099,-0.610521 51.704085,-0.610494 51.704024,-0.610447 51.703908,-0.610425 51.703886,-0.610416 51.703879,-0.610398 51.703832,-0.610330 51.703691,-0.610275 51.703594,-0.610221 51.703505,-0.610188 51.703505,-0.610163 51.703511,-0.610059 51.703562,-0.609935 51.703620,-0.609871 51.703657,-0.609777 51.703705,-0.609638 51.703768,-0.609502 51.703810,-0.609391 51.703826,-0.609397 51.703845,-0.609546 51.703813,-0.609650 51.703777,-0.609865 51.703682,-0.610194 51.703546,-0.610426 51.704024,-0.610438 51.704074,-0.610444 51.704110,-0.610446 51.704143,-0.610445 51.704204,-0.610437 51.704254,-0.610418 51.704338,-0.610402 51.704397,-0.610359 51.704572,-0.610289 51.704790,-0.610275 51.704822,-0.610238 51.704896,-0.610109 51.705175,-0.610101 51.705184,-0.609879 51.705482,-0.609751 51.705679,-0.609703 51.705702)))
point: POINT (-0.610213 51.704608)
notes
entry-date: 2010-02-18
start-date: 2010-02-18
end-date

Your data is missing a tree-preservation-order.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.