One-to-one relationship swaps principal/dependent moving from 1.1 to 2.0

The model below makes one end principal in 1.1 and the other end principal in 2.0.

public class ProductsTable
 {
     [Key]
     public int id { get; set; }
     public virtual ProductsInventoryTable ProductsInventory { get; set; }
 }

 public class ProductsInventoryTable
 {
     [Key]
     public int id { get; set; }
     public virtual ProductsTable Product { get; set; }
 }

 public class TestContext : DbContext
 {
     public DbSet<ProductsTable> ProductsTable { get; set; }
     public DbSet<ProductsInventoryTable> ProductsInventoryTable { get; set; }

     protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         => optionsBuilder.UseSqlServer(
             @"Server=(localdb)\mssqllocaldb;Database=Test;Trusted_Connection=True;ConnectRetryCount=0");
 }

1.1.2:

EntityType: ProductsInventoryTable
  Properties: 
    id (int) Required PK ReadOnlyAfterSave RequiresValueGenerator ValueGenerated.OnAdd 0 0 0 -1 0
  Navigations: 
    Product (<Product>k__BackingField, ProductsTable) ToDependent ProductsTable Inverse: ProductsInventory 0 -1 1 -1 -1
  Keys: 
    id PK
EntityType: ProductsTable
  Properties: 
    id (int) Required PK FK ReadOnlyAfterSave 0 0 0 -1 0
  Navigations: 
    ProductsInventory (<ProductsInventory>k__BackingField, ProductsInventoryTable) ToPrincipal ProductsInventoryTable Inverse: Product 0 -1 1 -1 -1
  Keys: 
    id PK
  Foreign keys: 
    id -> ProductsInventoryTable.id Unique ToDependent: Product ToPrincipal: ProductsInventory

2.0:

EntityType: ProductsInventoryTable
  Properties: 
    id (int) Required PK FK AfterSave:Throw 0 0 0 -1 0
  Navigations: 
    Product (<Product>k__BackingField, ProductsTable) ToPrincipal ProductsTable Inverse: ProductsInventory 0 -1 1 -1 -1
  Keys: 
    id PK
  Foreign keys: 
    ProductsInventoryTable {'id'} -> ProductsTable {'id'} Unique ToDependent: ProductsInventory ToPrincipal: Product
EntityType: ProductsTable
  Properties: 
    id (int) Required PK AfterSave:Throw ValueGenerated.OnAdd 0 0 0 -1 0
  Navigations: 
    ProductsInventory (<ProductsInventory>k__BackingField, ProductsInventoryTable) ToDependent ProductsInventoryTable Inverse: Product 0 -1 1 -1 -1
  Keys: 
    id PK

[AndriySvyryd]

This should throw in validation as ambiguous principal end

[ajcvickers]

Triage decision: we will correctly detect this as ambiguous in 2.1 and throw a validation exception. Given that we are going to do this in 2.1 and we think that hitting this will not be super-common in 2.0, we are not going to patch anything.