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: ZZZZDVESXE742
name: The Bucks County Council (Amersham Rural District) Tree Preservation Order No 8 - 1949 Confirmed by
tree-preservation-order: undefined
TPO/1949/008
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.723992 51.714148,-0.723981 51.714197,-0.724040 51.714242,-0.724168 51.714239,-0.724661 51.714222,-0.725791 51.714088,-0.725841 51.714088,-0.725859 51.714095,-0.725952 51.714173,-0.725960 51.714259,-0.725973 51.714310,-0.726001 51.714338,-0.726029 51.714348,-0.726640 51.714459,-0.726894 51.714485,-0.727149 51.714524,-0.727108 51.714060,-0.727066 51.713826,-0.727003 51.713557,-0.727016 51.713471,-0.727058 51.713378,-0.726585 51.713298,-0.726040 51.713233,-0.725984 51.713219,-0.725853 51.713154,-0.725795 51.713138,-0.725491 51.713087,-0.724908 51.712957,-0.724571 51.712926,-0.724419 51.712901,-0.724027 51.712807,-0.723665 51.712708,-0.723475 51.712688,-0.723148 51.712634,-0.723127 51.712590,-0.723102 51.712573,-0.722942 51.712550,-0.722802 51.712494,-0.722711 51.712634,-0.722707 51.712658,-0.722714 51.712749,-0.722733 51.712794,-0.722776 51.712861,-0.722752 51.713006,-0.722668 51.713380,-0.723462 51.713455,-0.723654 51.713462,-0.723850 51.713483,-0.723844 51.713578,-0.723891 51.713969,-0.724013 51.714082,-0.723992 51.714148)))
point: POINT (-0.724995 51.713549)
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.