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: TPO1978_018_G_002
name: G2
tree-preservation-order: undefined
TPO1978_018
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.617475 53.886533,-1.617477 53.886560,-1.617461 53.886580,-1.617381 53.886633,-1.617372 53.886659,-1.617409 53.886668,-1.617618 53.886683,-1.617680 53.886669,-1.617715 53.886594,-1.617748 53.886553,-1.617809 53.886533,-1.617884 53.886523,-1.617902 53.886514,-1.617908 53.886485,-1.617834 53.886426,-1.617778 53.886339,-1.617742 53.886308,-1.617697 53.886289,-1.617594 53.886270,-1.617382 53.886253,-1.617156 53.886289,-1.617008 53.886294,-1.616958 53.886307,-1.616923 53.886329,-1.616905 53.886351,-1.616911 53.886385,-1.616952 53.886406,-1.617369 53.886480,-1.617431 53.886496,-1.617467 53.886519,-1.617475 53.886533)))
point: POINT (-1.617464 53.88643)
notes
entry-date: 2026-02-12
start-date: 1978-10-31
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.