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: ZZZZZTESRW112
name: South Bucks District Council (No.15) Tree Preservation Order 1995; dated 3/5/95; made under Sections
tree-preservation-order: undefined
TPO/SBDC/1995/15
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.651780 51.608886,-0.652415 51.608984,-0.653067 51.609051,-0.653478 51.609002,-0.653839 51.608943,-0.654223 51.608867,-0.654528 51.608787,-0.655027 51.608634,-0.655168 51.608577,-0.655441 51.608434,-0.655716 51.608264,-0.656303 51.607869,-0.656404 51.607791,-0.656576 51.607614,-0.656600 51.607536,-0.656595 51.607459,-0.656573 51.607416,-0.656504 51.607358,-0.656398 51.607291,-0.656268 51.607228,-0.656135 51.607176,-0.655974 51.607131,-0.655853 51.607108,-0.655685 51.607094,-0.655565 51.607098,-0.655390 51.607119,-0.655028 51.607183,-0.654753 51.607247,-0.654199 51.607399,-0.653843 51.607515,-0.652715 51.608048,-0.652298 51.608252,-0.651722 51.608576,-0.651780 51.608886)))
point: POINT (-0.654251 51.608112)
notes
organisation
entry-date: 2017-07-04
start-date: 2017-07-04
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.