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: ZZZZZVESRW592
name: Bucks. County Council (Eton Rural District) Tree Preservation Order No.4; 1950; dated 18/2/50 under
tree-preservation-order: undefined
TPO/BCC/1950/04
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.507801 51.551327,-0.507562 51.551441,-0.507447 51.551506,-0.507231 51.551645,-0.507055 51.551773,-0.506982 51.551837,-0.506877 51.551954,-0.506944 51.551997,-0.507047 51.552100,-0.507182 51.552200,-0.507486 51.552376,-0.507598 51.552463,-0.508075 51.552795,-0.508155 51.552864,-0.508214 51.552947,-0.508221 51.553012,-0.508190 51.553199,-0.508191 51.553241,-0.508202 51.553264,-0.508255 51.553312,-0.508357 51.553373,-0.508458 51.553415,-0.508631 51.553465,-0.508742 51.553309,-0.509065 51.552941,-0.509068 51.552806,-0.509085 51.552706,-0.509325 51.552561,-0.511658 51.552029,-0.513243 51.552109,-0.514851 51.551709,-0.515050 51.550709,-0.515015 51.550620,-0.512779 51.550067,-0.511951 51.550436,-0.511603 51.550609,-0.509667 51.550999,-0.509619 51.550938,-0.508360 51.551157,-0.507801 51.551327)))
point: POINT (-0.51108 51.551528)
notes
organisation
entry-date: 2017-07-04
start-date: 2017-07-04
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.