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: tpo1733
name: Swanland No. 2 - 1974
tree-preservation-order: undefined
155
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-0.489777 53.739151,-0.490015 53.739095,-0.490035 53.739121,-0.490287 53.739052,-0.490337 53.739061,-0.490311 53.738993,-0.490362 53.738951,-0.490465 53.738885,-0.490403 53.738812,-0.490411 53.738783,-0.490455 53.738758,-0.490094 53.738280,-0.489606 53.737567,-0.489517 53.737448,-0.489417 53.737260,-0.486753 53.737142,-0.487047 53.738102,-0.487555 53.738014,-0.487438 53.737743,-0.487910 53.737694,-0.487946 53.737703,-0.488113 53.738005,-0.488465 53.737942,-0.488567 53.738074,-0.488708 53.738321,-0.488768 53.738445,-0.488947 53.738426,-0.488927 53.738396,-0.488835 53.738378,-0.488800 53.738340,-0.488859 53.738290,-0.488847 53.738222,-0.488873 53.738112,-0.488917 53.738079,-0.488969 53.738012,-0.488898 53.737998,-0.488842 53.737972,-0.488822 53.737942,-0.488830 53.737908,-0.488868 53.737854,-0.488961 53.737855,-0.489053 53.737869,-0.489140 53.737899,-0.489343 53.738254,-0.489682 53.738249,-0.489909 53.738256,-0.489980 53.738287,-0.489999 53.738329,-0.490020 53.738412,-0.490028 53.738520,-0.490073 53.738652,-0.490142 53.738733,-0.490134 53.738762,-0.490090 53.738791,-0.489602 53.738883,-0.489777 53.739151)))
point: POINT (-0.488585 53.737797)
notes
entry-date: 1974-11-13
start-date: 1974-11-13
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.