Tree preservation zone

There is a problem

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

reference: TPO316
name: Fields surrounding village
tree-preservation-order: undefined
Roxby 1951
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-0.617466 53.639725,-0.617466 53.639738,-0.617471 53.639764,-0.617480 53.639789,-0.617487 53.639801,-0.617515 53.639836,-0.617540 53.639857,-0.617569 53.639877,-0.617602 53.639894,-0.617619 53.639901,-0.617676 53.639920,-0.617717 53.639929,-0.617738 53.639932,-0.617803 53.639937,-0.617868 53.639935,-0.617910 53.639929,-0.617951 53.639921,-0.618009 53.639902,-0.618043 53.639887,-0.618088 53.639859,-0.618113 53.639837,-0.618134 53.639815,-0.618149 53.639791,-0.618155 53.639778,-0.618162 53.639753,-0.618164 53.639740,-0.618164 53.639714,-0.618158 53.639688,-0.618153 53.639676,-0.618139 53.639651,-0.618109 53.639617,-0.618097 53.639606,-0.618069 53.639586,-0.618020 53.639561,-0.617964 53.639541,-0.617902 53.639528,-0.617860 53.639523,-0.617838 53.639522,-0.617773 53.639523,-0.617710 53.639531,-0.617650 53.639546,-0.617613 53.639560,-0.617579 53.639576,-0.617563 53.639585,-0.617535 53.639605,-0.617501 53.639638,-0.617492 53.639650,-0.617478 53.639674,-0.617469 53.639700,-0.617466 53.639725)))
point: POINT (-0.617815 53.639729)
notes
entry-date: 1951-11-21
start-date: 1951-08-20
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.