Tree preservation zone

There is a problem

reference: TPO 0007 (1967)/A4
name: STAPLEFORD Gog Magog
tree-preservation-order: TPO 0007 (1967)
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((0.188897 52.156398,0.189100 52.156600,0.188528 52.156788,0.188517 52.156797,0.188480 52.156799,0.188241 52.156881,0.187843 52.156585,0.186574 52.157070,0.185724 52.156563,0.185649 52.156533,0.185480 52.156510,0.185317 52.156415,0.185173 52.156303,0.184956 52.156104,0.184646 52.155844,0.184555 52.155756,0.184384 52.155642,0.185100 52.155089,0.185115 52.155047,0.185175 52.155003,0.185249 52.154863,0.185300 52.154818,0.185463 52.154747,0.186039 52.154406,0.186304 52.154286,0.186392 52.154263,0.186446 52.154265,0.186500 52.154278,0.186667 52.154347,0.186730 52.154399,0.186890 52.154481,0.187173 52.154590,0.187449 52.154383,0.187483 52.154330,0.187599 52.154317,0.187700 52.154243,0.187702 52.154195,0.187534 52.153921,0.187516 52.153904,0.187655 52.153773,0.187861 52.153663,0.188228 52.153535,0.188310 52.153475,0.188374 52.153485,0.188486 52.153402,0.188711 52.153273,0.188483 52.153103,0.188628 52.153013,0.189017 52.153176,0.189888 52.154359,0.189647 52.154446,0.189838 52.154704,0.189996 52.154939,0.190657 52.155860,0.189055 52.156298,0.188897 52.156398)))
point: POINT (0.187661 52.155328)
notes
entry-date: 2025-06-26
start-date: start-date must be a real date
1967-12-05
end-date

Your dataset is missing the start-date column.

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

The date that the tree preservation order came into force, written in YYYY-MM-DD format.

Example: 1984-03-28