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: ZZZZDVESXE562
name: Amersham Rural District Council (Beechwood, Chalfont St Giles) Tree Preservation Order, 1966 Confirm
tree-preservation-order: undefined
TPO/1966/035
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.554833 51.655441,-0.554956 51.655400,-0.555050 51.655371,-0.555216 51.655324,-0.555300 51.655303,-0.555473 51.655264,-0.555511 51.655256,-0.555655 51.655231,-0.555622 51.655189,-0.555577 51.655146,-0.555451 51.655041,-0.555359 51.654972,-0.555283 51.654920,-0.555220 51.654881,-0.555194 51.654869,-0.555167 51.654860,-0.555136 51.654853,-0.555110 51.654850,-0.555079 51.654849,-0.555011 51.654853,-0.554916 51.654865,-0.554644 51.654916,-0.554441 51.654960,-0.554274 51.654994,-0.554339 51.655098,-0.554418 51.655230,-0.554546 51.655193,-0.554833 51.655441)))
point: POINT (-0.554955 51.655119)
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.