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: TPO629
name: 4/1964
tree-preservation-order: undefined
4/1964
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.586089 51.303471,0.586409 51.303796,0.586585 51.303988,0.586453 51.303985,0.586308 51.304049,0.586153 51.304145,0.585728 51.304198,0.585573 51.304190,0.585242 51.304283,0.584955 51.304314,0.584724 51.304381,0.584522 51.304412,0.584298 51.304429,0.584056 51.304430,0.583785 51.304449,0.583598 51.304425,0.582985 51.304486,0.582622 51.304510,0.582606 51.304452,0.582590 51.304329,0.582560 51.304243,0.582405 51.304060,0.582372 51.303989,0.582372 51.303982,0.582806 51.303877,0.583131 51.303812,0.584246 51.303668,0.585323 51.303549,0.585662 51.303520,0.585977 51.303482,0.585993 51.303471,0.586089 51.303471)))
point: POINT (0.584455 51.304008)
notes: County of Kent (Hollingbourne Rural District) Tree Preservat Order No 4 of 1964 under Section 29 of the Town and Country Planning Act 1962 Woodlands - W1 mainly Chestnut coppice but some
organisation
entry-date: 1967-03-31
start-date: 1964-11-30
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.