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: TPO116
name: 25/1995
tree-preservation-order: undefined
25/1995
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.632991 51.334037,0.632721 51.334027,0.632449 51.334028,0.632084 51.333989,0.631215 51.333462,0.630967 51.333108,0.630576 51.332465,0.630678 51.332363,0.631300 51.332120,0.631325 51.332097,0.631318 51.332036,0.631264 51.331965,0.631161 51.331859,0.631021 51.331771,0.630907 51.331710,0.630786 51.331621,0.630593 51.331498,0.630505 51.331471,0.630416 51.331455,0.630348 51.331429,0.630295 51.331376,0.630257 51.331316,0.630257 51.331260,0.630303 51.331175,0.630183 51.331048,0.629725 51.330598,0.629529 51.330486,0.629555 51.330416,0.629688 51.330397,0.629812 51.330405,0.630020 51.330678,0.630580 51.331331,0.630774 51.331343,0.631301 51.331805,0.631348 51.331889,0.631570 51.332128,0.631675 51.332262,0.632408 51.333239,0.632991 51.334037)))
point: POINT (0.631503 51.332801)
notes: The Maidstone Borough Council Tree Preservation Order No 25 of 1995 under Section 198 of the Town and Country Planning Act 1990. Woodlands - W1 consisting Beech, Oak, Sycamore,
organisation
entry-date: 1995-12-22
start-date: 1995-12-22
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.