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: TPO605
name: 17/1976
tree-preservation-order: undefined
17/1976
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.585236 51.298671,0.585040 51.298768,0.584958 51.298818,0.584746 51.298908,0.584759 51.298920,0.584272 51.299130,0.584139 51.299107,0.584170 51.299032,0.584217 51.298957,0.584245 51.298928,0.584302 51.298909,0.584645 51.298887,0.584730 51.298869,0.584789 51.298847,0.585164 51.298645,0.585394 51.298480,0.585477 51.298396,0.585122 51.298059,0.585039 51.298089,0.585187 51.298226,0.584931 51.298386,0.584541 51.298178,0.584502 51.298314,0.584340 51.298300,0.584432 51.297963,0.584317 51.297947,0.584431 51.297567,0.584638 51.297456,0.584698 51.297454,0.584906 51.297626,0.585040 51.297720,0.585096 51.297769,0.585140 51.297820,0.585366 51.298031,0.585502 51.298172,0.585642 51.298335,0.585753 51.298445,0.585554 51.298526,0.585236 51.298671)))
point: POINT (0.584853 51.298136)
notes: Maidstone Borough Council Tree Preservation Order No. 17 of 1976 under Section 60 of the Town and Country Planning Act 1971. Woodlands - W3 Comprising Yew (Taxus baccata),
organisation
entry-date: 1976-07-12
start-date: 1976-07-02
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.