Structured Data Property Issue

I think. You can get your desire result in very few steps but you have complicated it.

We have made automated system for few of the schema types. Such as Article, NewsArticle, TechArticle, BlogPosting etc. This is why because we can get most of the schema’s properties value for these schema on post itself so just follow these step.

1. Setup Article schema and modify only two fields like this ( https://prnt.sc/skhr0q ) because you do not want these two properties.
2. Do not modify it on single post keep it like this ( https://prnt.sc/skht1m ). You can modify it if you want your different data for the schema. Its your choice.