Tree preservation zone

There is a problem

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

reference: 121/TAN A1
name: North of Posterngate Farm Eastbourne Road South Godstone
tree-preservation-order: undefined
121/TAN
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-0.051257 51.227334,-0.051204 51.227269,-0.050959 51.227247,-0.050706 51.227195,-0.050152 51.227133,-0.049918 51.227058,-0.049573 51.226963,-0.049273 51.226917,-0.048528 51.226920,-0.048227 51.226938,-0.047945 51.226969,-0.047623 51.226991,-0.047479 51.226649,-0.047461 51.226402,-0.047506 51.226219,-0.047510 51.226007,-0.047483 51.225932,-0.047437 51.225878,-0.047427 51.225817,-0.047399 51.225771,-0.047398 51.225734,-0.047353 51.225719,-0.047302 51.225723,-0.047369 51.225931,-0.047392 51.226038,-0.047395 51.226180,-0.047377 51.226393,-0.047347 51.226452,-0.047343 51.226487,-0.047471 51.227070,-0.047788 51.227068,-0.048534 51.227018,-0.049090 51.227012,-0.049452 51.227057,-0.050184 51.227232,-0.050581 51.227303,-0.051031 51.227364,-0.051281 51.227359,-0.051257 51.227334)))
point: POINT (-0.048898 51.226903)
notes
organisation
entry-date: 1983-08-19
start-date: 1983-08-19
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.