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: ZZZZDUESXE572
name: The Chiltern District Council (Land adjacent to Shenstone House, Doggetts Wood Lane, Chalfont St Gil
tree-preservation-order: undefined
TPO/1989/006
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.565761 51.658698,-0.565743 51.658716,-0.565745 51.658742,-0.565722 51.658769,-0.565612 51.658806,-0.565599 51.658820,-0.565594 51.658847,-0.565563 51.658854,-0.565532 51.658898,-0.565464 51.658905,-0.565433 51.658919,-0.565415 51.658947,-0.565419 51.658963,-0.565452 51.658993,-0.565476 51.658999,-0.565580 51.658986,-0.565617 51.658938,-0.565662 51.658933,-0.565695 51.658917,-0.565710 51.658889,-0.565738 51.658880,-0.565777 51.658844,-0.565834 51.658841,-0.565882 51.658817,-0.565897 51.658779,-0.565871 51.658741,-0.565870 51.658719,-0.565898 51.658702,-0.565979 51.658715,-0.566017 51.658701,-0.566039 51.658681,-0.566038 51.658647,-0.566006 51.658620,-0.565943 51.658588,-0.565885 51.658581,-0.565831 51.658604,-0.565821 51.658664,-0.565761 51.658698)))
point: POINT (-0.565744 51.658793)
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.