Tree preservation zone

There is a problem

tree-preservation-order column must match the reference field in the tree preservation order dataset

reference: TPO56
name
tree-preservation-order: undefined
Ashby Road Order 1983
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-0.655848 53.574178,-0.655848 53.574190,-0.655851 53.574202,-0.655857 53.574214,-0.655864 53.574225,-0.655885 53.574245,-0.655905 53.574257,-0.655920 53.574264,-0.655954 53.574274,-0.655981 53.574277,-0.656009 53.574277,-0.656036 53.574274,-0.656054 53.574270,-0.656093 53.574254,-0.656123 53.574231,-0.656138 53.574208,-0.656142 53.574197,-0.656144 53.574185,-0.656144 53.574172,-0.656142 53.574160,-0.656137 53.574149,-0.656126 53.574132,-0.656110 53.574117,-0.656091 53.574104,-0.656068 53.574094,-0.656033 53.574085,-0.655997 53.574082,-0.655960 53.574085,-0.655934 53.574091,-0.655918 53.574097,-0.655896 53.574108,-0.655877 53.574122,-0.655863 53.574137,-0.655853 53.574154,-0.655849 53.574166,-0.655848 53.574178)))
point: POINT (-0.655996 53.57418)
notes
entry-date: 1983-11-21
start-date: 1983-01-01
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.