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: tpo1787
name: Castle Hill Hospital, Cottingham - 1994
tree-preservation-order: undefined
198
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((-0.448009 53.779081,-0.447997 53.778965,-0.447492 53.778988,-0.447522 53.779055,-0.446214 53.779202,-0.446244 53.779261,-0.445934 53.779286,-0.445514 53.779203,-0.445221 53.779209,-0.444877 53.779272,-0.444596 53.779365,-0.444450 53.779353,-0.444163 53.779205,-0.443918 53.779211,-0.443644 53.779131,-0.443387 53.779041,-0.441613 53.779471,-0.439823 53.779891,-0.439868 53.779998,-0.440244 53.779954,-0.441080 53.779801,-0.441359 53.779737,-0.441476 53.779671,-0.441970 53.779948,-0.441536 53.780251,-0.441139 53.780400,-0.440502 53.780459,-0.439949 53.780442,-0.439593 53.780380,-0.439306 53.780241,-0.439204 53.780336,-0.439170 53.780384,-0.439471 53.780600,-0.440298 53.780688,-0.441393 53.780577,-0.441790 53.780398,-0.442580 53.779744,-0.442668 53.779571,-0.442654 53.779494,-0.443443 53.779311,-0.444188 53.779388,-0.444404 53.779709,-0.445492 53.779367,-0.445733 53.779437,-0.445960 53.779460,-0.446105 53.779519,-0.446316 53.779532,-0.446579 53.779468,-0.446760 53.779412,-0.446845 53.779317,-0.448009 53.779081)))
point: POINT (-0.442958 53.779699)
notes
entry-date: 1994-07-06
start-date: 1994-07-06
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.