Tree preservation zone

There is a problem

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

reference: TPO398.G14
name: Within the grounds of the school.
tree-preservation-order: undefined
TPO398
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-2.901057 53.382381,-2.901006 53.382357,-2.901002 53.382360,-2.901045 53.382379,-2.900969 53.382442,-2.900926 53.382423,-2.900906 53.382442,-2.900903 53.382448,-2.900905 53.382461,-2.900917 53.382470,-2.900924 53.382473,-2.900932 53.382474,-2.900986 53.382471,-2.901114 53.382470,-2.901134 53.382450,-2.901185 53.382450,-2.901185 53.382431,-2.901139 53.382404,-2.901257 53.382273,-2.901349 53.382270,-2.901435 53.382278,-2.901509 53.382288,-2.901502 53.382403,-2.901221 53.382419,-2.901219 53.382449,-2.901267 53.382449,-2.901299 53.382469,-2.901338 53.382470,-2.901340 53.382511,-2.901580 53.382510,-2.901583 53.382429,-2.901585 53.382301,-2.901583 53.382267,-2.901581 53.382259,-2.901578 53.382253,-2.901509 53.382232,-2.901477 53.382225,-2.901410 53.382216,-2.901298 53.382210,-2.901231 53.382212,-2.901181 53.382219,-2.901156 53.382226,-2.901016 53.382346,-2.901061 53.382366,-2.901057 53.382381)))
point: POINT (-2.901306 53.382366)
notes: 1 Sweet Chestnut, 7 Holly & 10 Prunus
entry-date: 2011-04-12
start-date: 2011-08-12
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.