Possible confusing/inaccurate statement regarding entity tracking

This statement

`A recursive search of the navigation properties will be performed to find reachable entities that are not already being tracked by the context. All entities found will be tracked by the context.
`

does not appear to be correct as the method can throw the following exception

```
System.InvalidOperationException: The instance of entity type '{entityType}' cannot be tracked because another instance with the key value '{{key}:{keyValue}}' is already being tracked. When attaching existing entities, ensure that only one entity instance with a given key value is attached.
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.IdentityMap`1.ThrowIdentityConflict(InternalEntityEntry entry)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.IdentityMap`1.Add(TKey key, InternalEntityEntry entry, Boolean updateDuplicate)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.IdentityMap`1.Add(TKey key, InternalEntityEntry entry)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.IdentityMap`1.Add(InternalEntityEntry entry)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.StartTracking(InternalEntityEntry entry)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.InternalEntityEntry.SetEntityState(EntityState oldState, EntityState newState, Boolean acceptChanges, Boolean modifyProperties)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.InternalEntityEntry.SetEntityState(EntityState entityState, Boolean acceptChanges, Boolean modifyProperties, Nullable`1 forceStateWhenUnknownKey)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.EntityGraphAttacher.PaintAction(EntityEntryGraphNode`1 node)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.EntityEntryGraphIterator.TraverseGraph[TState](EntityEntryGraphNode`1 node, Func`2 handleNode)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.EntityEntryGraphIterator.TraverseGraph[TState](EntityEntryGraphNode`1 node, Func`2 handleNode)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.EntityEntryGraphIterator.TraverseGraph[TState](EntityEntryGraphNode`1 node, Func`2 handleNode)
at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.EntityGraphAttacher.AttachGraph(InternalEntityEntry rootEntry, EntityState targetState, EntityState storeGeneratedWithKeySetTargetState, Boolean forceStateWhenUnknownKey)
at Microsoft.EntityFrameworkCore.DbContext.SetEntityState(InternalEntityEntry entry, EntityState entityState)
at Microsoft.EntityFrameworkCore.DbContext.SetEntityState[TEntity](TEntity entity, EntityState entityState)
at Microsoft.EntityFrameworkCore.DbContext.Update[TEntity](TEntity entity)
```

The statement makes it sound as though there would be no attempt to track this entity as the method would only attach entities "not already being tracked".

---
#### Document Details

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* ID: 0a85575e-e16a-92ee-d689-eea4ed70356c
* Version Independent ID: 516505b4-3082-37c7-e6c9-2e2343a1458d
* Content: [DbContext.Update Method (Microsoft.EntityFrameworkCore)](https://docs.microsoft.com/en-us/dotnet/api/microsoft.entityframeworkcore.dbcontext.update?view=efcore-6.0)
* Content Source: [dotnet/xml/Microsoft.EntityFrameworkCore/DbContext.xml](https://github.com/dotnet/EntityFramework.ApiDocs/blob/live/dotnet/xml/Microsoft.EntityFrameworkCore/DbContext.xml)
* Product: **ef-core-api**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **avickers**