how to set related models

[Moodyqiqi]

strapi: 3.6.6
strapi-middleware-cache: 2.1.0

i have city and building models, i want to clear building cache when i update or delete city model.
in building/models/building/settings.json, i have set {attributes: {city: {model: "city"}}}
in middleware.js, i have set {clearRelatedCache: true}, it's not clear building cache when i edit or delete city model.

document said (this clears the whole cache for the related models), is there any way to set related models?

[laurenskling]

Same for me. I cannot get clearRelatedCache working. I want to clear my vehicle cache when an vehicleImage has updated, but it doesn't :(