Unable to restore/update discourse (PG::InvalidTextRepresentation: ERROR: invalid input syntax for type integer: "[]")

I’m not sure if I’ve done it correctly, but here is what I get :

=> #<ActiveRecord::Relation [#<SiteSetting id: 56, name: "selectable_avatars", data_type: 17, value: "[]", created_at: "2022-06-07 04:30:35.458837000 +0000", updated_at: "2022-06-08 08:14:54.196037000 +0000">]>