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: ZZZZDVESXE673
name: The Bucks County Council (Amersham Rural District) Tree Preservation Order No 6 - 1957 [Confirmed b
tree-preservation-order: undefined
TPO/1957/006
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.532965 51.678352,-0.532936 51.678200,-0.533250 51.678168,-0.533242 51.678125,-0.533399 51.678113,-0.533354 51.677896,-0.533606 51.677874,-0.533558 51.677631,-0.533522 51.677550,-0.533488 51.677504,-0.533449 51.677472,-0.533423 51.677472,-0.533395 51.677454,-0.533405 51.677446,-0.533323 51.677397,-0.533101 51.677302,-0.532858 51.677236,-0.532525 51.677175,-0.532385 51.677162,-0.532277 51.677128,-0.531219 51.676947,-0.530965 51.676929,-0.530439 51.676930,-0.530119 51.676922,-0.530180 51.678114,-0.530545 51.678111,-0.530548 51.678149,-0.531599 51.678059,-0.532183 51.678044,-0.532222 51.678431,-0.532276 51.678418,-0.532333 51.678416,-0.532999 51.678486,-0.532965 51.678352)))
point: POINT (-0.531748 51.677629)
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.