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: 1/76/15-226
name: 22 Individual 11 Groups
tree-preservation-order: undefined
1/76/15-226
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((0.248159 51.931881,0.248117 51.931889,0.248064 51.931921,0.248033 51.931946,0.248021 51.931979,0.248013 51.932014,0.248008 51.932056,0.248015 51.932095,0.248036 51.932124,0.248089 51.932166,0.248157 51.932187,0.248202 51.932197,0.248228 51.932212,0.248232 51.932230,0.248223 51.932249,0.248200 51.932257,0.248170 51.932254,0.248117 51.932244,0.248064 51.932227,0.248023 51.932207,0.247999 51.932188,0.247988 51.932177,0.247980 51.932165,0.247939 51.932066,0.247936 51.931985,0.247962 51.931944,0.247997 51.931907,0.248074 51.931855,0.248132 51.931829,0.248211 51.931821,0.248301 51.931829,0.248350 51.931840,0.248381 51.931862,0.248382 51.931873,0.248363 51.931891,0.248316 51.931882,0.248228 51.931875,0.248159 51.931881)))
point: POINT (0.248098 51.932021)
notes
entry-date: 1977-04-18
start-date: 1977-04-18
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.