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: ZZZZDVESXE753
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 (((-0.611519 51.698753,-0.611552 51.698779,-0.611584 51.698785,-0.611731 51.698753,-0.611827 51.698214,-0.611889 51.697701,-0.611694 51.697519,-0.611696 51.697501,-0.611676 51.697500,-0.611596 51.698258,-0.611512 51.698728,-0.611519 51.698753)),((-0.614211 51.697808,-0.614063 51.698074,-0.613937 51.698171,-0.613425 51.698323,-0.613264 51.698409,-0.612923 51.698633,-0.611982 51.699145,-0.612369 51.699053,-0.612718 51.698864,-0.613212 51.698583,-0.613400 51.698468,-0.613598 51.698382,-0.613932 51.698273,-0.614094 51.698194,-0.614134 51.698166,-0.614151 51.698141,-0.614203 51.698000,-0.614223 51.697908,-0.614211 51.697808)),((-0.611406 51.699291,-0.611388 51.699357,-0.611664 51.699198,-0.611887 51.699106,-0.612150 51.698978,-0.612300 51.698899,-0.612295 51.698886,-0.612271 51.698867,-0.612232 51.698859,-0.612167 51.698879,-0.611754 51.699086,-0.611705 51.699094,-0.611663 51.699076,-0.611658 51.699061,-0.611671 51.698979,-0.611483 51.698969,-0.611406 51.699291)))
point: POINT (-0.612318 51.698486)
notes
organisation
entry-date: 2010-02-18
start-date: 2010-02-18
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.