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: ZZZZDUESXE422
name: The Chiltern District Council (Land at Willow Wood, Ashley Green) Tree Preservation Order 1989 (No 2
tree-preservation-order: undefined
TPO/1989/028
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.599351 51.749065,-0.599287 51.749086,-0.599408 51.749228,-0.599471 51.749286,-0.599610 51.749266,-0.599868 51.749162,-0.600193 51.749054,-0.601114 51.748703,-0.601162 51.748789,-0.601208 51.748831,-0.601530 51.748974,-0.602002 51.749099,-0.602172 51.749113,-0.602294 51.749101,-0.602143 51.748985,-0.602083 51.748927,-0.602065 51.748892,-0.602001 51.748840,-0.601922 51.748725,-0.601820 51.748544,-0.601618 51.748297,-0.601770 51.748242,-0.601465 51.747742,-0.601484 51.747663,-0.601352 51.747698,-0.600939 51.747859,-0.600428 51.748123,-0.600370 51.748178,-0.600319 51.748282,-0.600310 51.748322,-0.600318 51.748380,-0.600364 51.748462,-0.600372 51.748500,-0.600235 51.748580,-0.599825 51.748783,-0.599654 51.748912,-0.599440 51.749031,-0.599351 51.749065)))
point: POINT (-0.600909 51.748538)
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.