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: 1/83/17-760
name: 81 Individual, 18 Groups
tree-preservation-order: undefined
1/83/17-760
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((0.216222 52.037515,0.216228 52.037528,0.216236 52.037553,0.216229 52.037575,0.216255 52.037691,0.216278 52.037811,0.216283 52.037846,0.216293 52.037885,0.216307 52.038007,0.216314 52.038040,0.216294 52.038055,0.216186 52.038117,0.216138 52.038148,0.216123 52.038160,0.216103 52.038184,0.215931 52.038373,0.215853 52.038469,0.215820 52.038525,0.215795 52.038571,0.215777 52.038615,0.215579 52.038593,0.215600 52.038506,0.215664 52.038370,0.215751 52.038267,0.215828 52.038166,0.215976 52.038026,0.216032 52.037944,0.216044 52.037868,0.216025 52.037771,0.216019 52.037622,0.215996 52.037560,0.216000 52.037498,0.216099 52.037498,0.216190 52.037491,0.216222 52.037515)))
point: POINT (0.216003 52.038057)
notes
entry-date: 1984-02-14
start-date: 1984-02-14
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.