Tree preservation zone

There is a problem

184 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: 90/00554/C
name: Rear of Nethrton works, Brow Lane, Holmfield
tree-preservation-order: undefined
90/00554/C
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.874402 53.753908,-1.874326 53.753988,-1.874272 53.754130,-1.874080 53.754473,-1.873948 53.754681,-1.873883 53.754764,-1.873813 53.754901,-1.873683 53.755078,-1.873467 53.755273,-1.873227 53.755474,-1.872485 53.756040,-1.872425 53.756098,-1.872446 53.756120,-1.872550 53.756136,-1.872613 53.756131,-1.872898 53.755985,-1.872977 53.755936,-1.873208 53.755704,-1.873476 53.755507,-1.873559 53.755425,-1.873588 53.755379,-1.873630 53.755249,-1.873657 53.755215,-1.873839 53.755055,-1.874034 53.754856,-1.874084 53.754748,-1.874245 53.754478,-1.874356 53.754228,-1.874455 53.753968,-1.874439 53.753934,-1.874402 53.753908)))
point: POINT (-1.873501 53.755223)
notes: Birch, Willow, sycamore, hawthorn
entry-date: 1990-11-30
start-date: 1990-11-30
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.