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: ZZZZDVESXE676
name: The Bucks County Council (Amersham Rural District) Tree Preservation (Amendment) Order No 1 - 1957 C
tree-preservation-order: undefined
TPO/1957/001
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.566789 51.642858,-0.566787 51.642859,-0.566812 51.642923,-0.566836 51.642993,-0.566851 51.643049,-0.566864 51.643111,-0.566872 51.643171,-0.566876 51.643259,-0.566874 51.643326,-0.566860 51.643418,-0.567285 51.643445,-0.567303 51.643443,-0.567360 51.643444,-0.567379 51.643441,-0.567481 51.643403,-0.567761 51.643293,-0.567863 51.643244,-0.568078 51.643132,-0.568210 51.643061,-0.568376 51.642976,-0.568933 51.642682,-0.569128 51.642582,-0.569296 51.642492,-0.570312 51.641981,-0.571054 51.641595,-0.571298 51.641470,-0.571114 51.641341,-0.570888 51.641190,-0.570214 51.641476,-0.569574 51.641754,-0.569433 51.641817,-0.569202 51.641907,-0.569152 51.641924,-0.568674 51.642034,-0.567958 51.642183,-0.567796 51.642220,-0.567570 51.642275,-0.567185 51.642365,-0.567165 51.642361,-0.567090 51.642476,-0.566977 51.642644,-0.566903 51.642738,-0.566839 51.642809,-0.566789 51.642858)))
point: POINT (-0.568665 51.642391)
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.