Microdata: Why does Google demand location for an event that is at a venue? - schema.org

Question

I have the following microdata HTML code:
<div itemscope itemtype="http://schema.org/PerformingArtsTheater">
<h2 itemprop="name">The Old Vic</h2>
<div itemscope itemtype="http://schema.org/TheaterEvent" itemprop="http://schema.org/event">
<h3 itemprop="name">Endgame</h3>
<div itemprop="startDate">2020-01-27</div>
</div>
</div>
I.e. : A PerformingArtsTheater called "The Old Vic" has an event, the TheaterEvent called "Endgame".
When an event is at a PerformingArtsTheater, which is a Place, I would think that is is obvious that the TheaterEvent's location is that same `PerformingArtsTheater`` ?
But Google's Structured Data Test Tool finds an error in the TheaterEvent: "A value for the location field is required.".
How come? Wouldn't a location field here be redundant at best, and a contradiction at worst?
(Like "February at The Old Vic: Endgame by Samuel Beckett at The Old Vic.")
Is there a way to please Gogle here, without introducing redundancy?

Answer 1

Thing > Event > TheaterEvent
TheaterEvent (Theater performance.) - location property expected Type place or more specific object like PerformingArtsTheater:
Thing > Place > CivicStructure > PerformingArtsTheater
In your case the PerformingArtsTheater is The Old Vic - the correct data structure outline:
Location (Required property for event snippet)
https://developers.google.com/search/docs/data-types/event
<div itemprop="location" itemscope="" itemtype="http://schema.org/PerformingArtsTheater">
<span itemprop="name">Theater name</span>
<meta itemprop="address" content="London, UK"/>
</div>
Put the location as PerformingArtsTheater property (Nested object)
<section itemscope="" itemtype="http://schema.org/TheaterEvent">
<h2 itemprop="name">Event Name</h2>
<div itemprop="startDate">2020-01-27</div>
<address itemprop="location" itemscope="" itemtype="http://schema.org/PerformingArtsTheater">
<p itemprop="name" content="Theater name">Theater name</p>
<meta itemprop="address" content="Bennelong Point, Sydney NSW 2000, Australia"/>
</address>
</section>
Result ==> No errors:
Google snippet preview (Add image, description and so on)
By the way this is great example of nesting schema.org objects.