Tree preservation zone

There is a problem

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

reference: TPO251.A1
name: Land bounded by Queens Drive, Mossley Hill Drive, Aigburth Vale and Carnatic Road L18.
tree-preservation-order: undefined
TPO251
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.928754 53.381110,-2.928722 53.381159,-2.928731 53.381186,-2.928774 53.381203,-2.928869 53.381209,-2.929350 53.381148,-2.929812 53.381056,-2.930184 53.380950,-2.930481 53.380847,-2.930999 53.380616,-2.931145 53.380526,-2.931173 53.380491,-2.931180 53.380464,-2.931182 53.380436,-2.931162 53.380385,-2.931296 53.380304,-2.931329 53.380292,-2.931420 53.380228,-2.931424 53.380110,-2.931451 53.379860,-2.931516 53.379490,-2.931613 53.379159,-2.931733 53.378832,-2.931656 53.378821,-2.930982 53.378782,-2.930678 53.378692,-2.930640 53.378696,-2.930558 53.378730,-2.930529 53.378750,-2.930493 53.378795,-2.930478 53.378860,-2.930453 53.378907,-2.929725 53.379747,-2.929717 53.379797,-2.929603 53.379928,-2.929547 53.379968,-2.929516 53.380003,-2.929191 53.380443,-2.928754 53.381110)))
point: POINT (-2.930393 53.379995)
notes: The several tree of whatever species situated within area A1 on map.
organisation
entry-date: 1992-02-14
start-date: 1992-04-13
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.