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: ZZZZZSESRW528
name: Eton R.D.C. Tree Preservation Order (No.4) 1974 dated 13/3/74 made under Ss.60 & 61 of the Town and
tree-preservation-order: undefined
TPO/BD/1974/04
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.564236 51.557314,-0.564140 51.557270,-0.564129 51.557263,-0.564117 51.557258,-0.564089 51.557251,-0.564074 51.557250,-0.564044 51.557253,-0.564018 51.557262,-0.564007 51.557268,-0.563991 51.557284,-0.563986 51.557293,-0.563984 51.557302,-0.563988 51.557321,-0.563993 51.557329,-0.564001 51.557337,-0.564022 51.557350,-0.564053 51.557373,-0.564103 51.557404,-0.564170 51.557427,-0.564200 51.557430,-0.564231 51.557427,-0.564245 51.557423,-0.564258 51.557417,-0.564269 51.557411,-0.564278 51.557403,-0.564290 51.557385,-0.564292 51.557375,-0.564291 51.557366,-0.564288 51.557356,-0.564282 51.557347,-0.564274 51.557339,-0.564236 51.557314)))
point: POINT (-0.564138 51.557341)
notes
entry-date: 2017-07-04
start-date: 2017-07-04
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.