Tree preservation zone

There is a problem

tree-preservation-order column must match the reference field in the tree preservation order dataset

reference: TPO256.A1
name: Land to east side of Allerton Road between Sycamore Park and Allerton Gofl Course.
tree-preservation-order: undefined
TPO256
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.889789 53.374491,-2.889788 53.374489,-2.889720 53.374501,-2.889782 53.374623,-2.889808 53.374679,-2.889810 53.374679,-2.889897 53.374864,-2.890130 53.375344,-2.890165 53.375423,-2.890186 53.375417,-2.890194 53.375413,-2.890200 53.375405,-2.890217 53.375399,-2.890647 53.375327,-2.890661 53.375328,-2.890748 53.375307,-2.890750 53.375311,-2.890936 53.375279,-2.890929 53.375268,-2.891078 53.375245,-2.891083 53.375254,-2.891476 53.375188,-2.891591 53.375340,-2.892016 53.375267,-2.892051 53.375263,-2.892251 53.375228,-2.892559 53.375176,-2.892640 53.375164,-2.893043 53.375095,-2.893006 53.375033,-2.892973 53.374969,-2.892946 53.374958,-2.892914 53.374902,-2.892902 53.374872,-2.892915 53.374858,-2.892924 53.374837,-2.892834 53.374615,-2.892807 53.374539,-2.892741 53.374365,-2.892702 53.374248,-2.892681 53.374164,-2.892674 53.374126,-2.892663 53.374030,-2.892661 53.373987,-2.892076 53.374091,-2.890984 53.374281,-2.890640 53.374343,-2.890103 53.374435,-2.889789 53.374491)))
point: POINT (-2.89144 53.374742)
notes: The several tree of whatever species situated within area A1 on map.
entry-date: 1993-02-02
start-date: 1993-07-13
end-date

Your data is missing a tree-preservation-order.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.