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: ZZZZDVESXE776
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 (((-0.611828 51.701518,-0.611889 51.701424,-0.612071 51.701182,-0.612082 51.701123,-0.612071 51.701078,-0.612080 51.701031,-0.612077 51.700983,-0.612169 51.700954,-0.611928 51.700605,-0.612223 51.700450,-0.612093 51.700368,-0.611815 51.700483,-0.611816 51.700578,-0.611850 51.700896,-0.611897 51.700976,-0.611902 51.701059,-0.611981 51.701124,-0.611995 51.701148,-0.611993 51.701171,-0.611959 51.701221,-0.611886 51.701283,-0.611848 51.701302,-0.611801 51.701305,-0.611763 51.701319,-0.611715 51.701396,-0.611610 51.701475,-0.611866 51.701845,-0.611898 51.701919,-0.611911 51.701993,-0.611934 51.702019,-0.612013 51.702056,-0.612113 51.702088,-0.612150 51.702120,-0.612204 51.702205,-0.612266 51.702267,-0.612333 51.702291,-0.612702 51.702326,-0.612726 51.702309,-0.612369 51.702246,-0.612238 51.702024,-0.612097 51.701895,-0.612031 51.701794,-0.611832 51.701554,-0.611828 51.701518)))
point: POINT (-0.611984 51.701342)
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.