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: ZZZZZSESRW254
name: South Bucks District Council (No.4) Tree Preservation Order 1989; dated 8/2/89; made under Sections
tree-preservation-order: undefined
TPO/SBDC/1989/04
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.552189 51.592080,-0.551831 51.591734,-0.551826 51.591711,-0.551796 51.591601,-0.551660 51.591619,-0.551442 51.591641,-0.551311 51.591641,-0.551244 51.591639,-0.551203 51.591636,-0.551168 51.591631,-0.551084 51.591616,-0.550999 51.591593,-0.550921 51.591568,-0.550861 51.591552,-0.550812 51.591545,-0.550790 51.591545,-0.550757 51.591548,-0.550740 51.591552,-0.550705 51.591568,-0.550685 51.591584,-0.550659 51.591612,-0.550640 51.591639,-0.550636 51.591650,-0.550631 51.591671,-0.550633 51.591723,-0.550643 51.591762,-0.550650 51.591781,-0.550664 51.591813,-0.550681 51.591843,-0.550701 51.591868,-0.550740 51.591904,-0.550782 51.591937,-0.550811 51.591956,-0.550869 51.591991,-0.550972 51.592048,-0.551011 51.592066,-0.551047 51.592085,-0.551179 51.592147,-0.551240 51.592172,-0.551307 51.592206,-0.551347 51.592234,-0.551451 51.592320,-0.552189 51.592080)))
point: POINT (-0.551379 51.591903)
notes
entry-date: 2017-07-04
start-date: 2017-07-04
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.