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: ZZZZDVESXE755
name: The Urban District of Chesham Interim Preservation Order No 1 Approved by Minister of Town and Count
tree-preservation-order: undefined
TPO/1948/077
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.590965 51.686974,-0.590912 51.686904,-0.590872 51.686845,-0.590830 51.686769,-0.590810 51.686736,-0.590782 51.686681,-0.590758 51.686640,-0.590723 51.686568,-0.590713 51.686552,-0.590679 51.686466,-0.590661 51.686429,-0.590631 51.686359,-0.590552 51.686155,-0.590540 51.686120,-0.590525 51.686084,-0.590497 51.685988,-0.590495 51.685987,-0.590481 51.685934,-0.590404 51.685979,-0.590367 51.686004,-0.590294 51.686048,-0.590206 51.686109,-0.590198 51.686117,-0.590174 51.686135,-0.589992 51.686254,-0.589960 51.686267,-0.589760 51.686338,-0.589502 51.686512,-0.589451 51.686548,-0.589614 51.686643,-0.589653 51.686663,-0.589728 51.686708,-0.589792 51.686742,-0.589942 51.686813,-0.590030 51.686851,-0.590094 51.686882,-0.590403 51.686989,-0.590505 51.687019,-0.590554 51.687035,-0.590636 51.687058,-0.590710 51.687085,-0.590756 51.687105,-0.590803 51.687121,-0.590854 51.687144,-0.590901 51.687162,-0.590959 51.687180,-0.590993 51.687187,-0.591228 51.687275,-0.591214 51.687259,-0.591191 51.687237,-0.591128 51.687168,-0.590965 51.686974)))
point: POINT (-0.590318 51.686602)
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.