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: ZZZZDVESXE271
name: The Chiltern District Council (Land Between Whichert Close and Wyngrave Place, Knotty Green, Bucking
tree-preservation-order: undefined
TPO/1982/003
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.656526 51.622590,-0.656466 51.622570,-0.656313 51.622531,-0.656144 51.622492,-0.655920 51.622452,-0.655910 51.622454,-0.655905 51.622459,-0.655905 51.622466,-0.655909 51.622472,-0.655923 51.622478,-0.656166 51.622521,-0.656486 51.622612,-0.656494 51.622619,-0.656487 51.622629,-0.656483 51.622641,-0.656483 51.622654,-0.656486 51.622663,-0.656499 51.622675,-0.656515 51.622684,-0.656537 51.622688,-0.656578 51.622687,-0.656621 51.622670,-0.656651 51.622680,-0.656784 51.622738,-0.656918 51.622812,-0.657073 51.622915,-0.657221 51.623024,-0.657305 51.623095,-0.657379 51.623178,-0.657386 51.623182,-0.657398 51.623183,-0.657407 51.623181,-0.657412 51.623176,-0.657412 51.623170,-0.657340 51.623082,-0.657238 51.622997,-0.657078 51.622878,-0.656878 51.622756,-0.656660 51.622645,-0.656526 51.622590)))
point: POINT (-0.656706 51.622737)
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.