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: ZZZZDVESXE786
name: The Rural District Council of Amersham Interim Tree Preservation Order [No 4 of 1948]
tree-preservation-order: undefined
TPO/1948/004
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.567219 51.666298,-0.567061 51.666064,-0.566738 51.665873,-0.566533 51.666225,-0.566450 51.666329,-0.566323 51.666545,-0.566286 51.666594,-0.566118 51.666910,-0.566122 51.666943,-0.566242 51.667146,-0.567494 51.667575,-0.568400 51.667899,-0.568549 51.667946,-0.568707 51.667985,-0.568903 51.668020,-0.569434 51.668091,-0.569571 51.667963,-0.569588 51.667970,-0.569819 51.667727,-0.569829 51.667701,-0.569827 51.667681,-0.569804 51.667656,-0.569772 51.667640,-0.568614 51.667365,-0.568921 51.666900,-0.569427 51.666568,-0.569339 51.666535,-0.568793 51.666384,-0.568391 51.666607,-0.568345 51.666582,-0.568189 51.666462,-0.567806 51.666142,-0.567219 51.666298)))
point: POINT (-0.567849 51.667024)
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.