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: ZZZZDVESXE754
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 (((-0.598075 51.690955,-0.597871 51.690931,-0.597410 51.690842,-0.597233 51.690798,-0.597227 51.690820,-0.597224 51.690853,-0.597226 51.690868,-0.597230 51.690882,-0.597236 51.690896,-0.597245 51.690910,-0.597269 51.690933,-0.597301 51.690953,-0.597352 51.690980,-0.597415 51.691008,-0.597452 51.691020,-0.597555 51.691040,-0.597599 51.691046,-0.597859 51.691074,-0.598217 51.691108,-0.598746 51.691165,-0.598898 51.691186,-0.598973 51.691194,-0.599117 51.691202,-0.599228 51.691206,-0.599807 51.691283,-0.599966 51.691312,-0.600452 51.691391,-0.600480 51.691387,-0.600757 51.691431,-0.600930 51.691456,-0.600994 51.691473,-0.601123 51.691515,-0.601059 51.691442,-0.600702 51.691344,-0.600516 51.691326,-0.600368 51.691305,-0.599569 51.691166,-0.599423 51.691144,-0.599225 51.691118,-0.599031 51.691097,-0.598640 51.691036,-0.598301 51.690986,-0.598075 51.690955)))
point: POINT (-0.598811 51.69112)
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.