- `spec.usages` is now required, may not contain duplicate values, and must only contain known usages
  - `status.conditions` may not contain duplicate types
  - `status.conditions[*].status` is now required

- Fixed a regression in default configurations, which enabled PodDisruptionConditions by default, 
  that prevented the control plane's pod garbage collector from deleting pods that contained duplicated field keys (env. variables with repeated keys or container ports). ([#121379](https://github.com/kubernetes/kubernetes/pull/121379), [@mimowo](https://github.com/mimowo)) [SIG Apps, Auth, Node, Scheduling and Testing]

		userPolicyMappingsFile: `{
  "foo": {
    "version": 0,
    "policy": "readwrite",
    "updatedAt": "2024-04-23T21:34:43.815519816Z"
  }
}
`,
		// Contains:
		//
		// 1. duplicate mapping with same policy, we should not error out;
		//
		// 2. non-LDAP group mapping, we should not error out;
		groupPolicyMappingsFile: `{
    "cn=project.c,ou=groups,ou=swengg,DC=min,dc=io": {

* kubectl and client-go now detect duplicated names for user, cluster and context when loading kubeconfig and report this condition as an error.  ([#60464](https://github.com/kubernetes/kubernetes/pull/60464), [@roycaihw](https://github.com/roycaihw))

### SIG Storage

- The AllowedTopologies field inside StorageClass is now validated against set and map semantics. Specifically, there cannot be duplicate TopologySelectorTerms, MatchLabelExpressions keys, or TopologySelectorLabelRequirement Values. ([#66843](https://github.com/kubernetes/kubernetes/pull/66843), [@verult](https://github.com/verult))

	c.Assert(err, nil)
	// execute the HTTP request.
	response3, err := s.client.Do(request)
	c.Assert(err, nil)
	c.Assert(response3.StatusCode, http.StatusOK)

	// The reason to duplicate this structure here is to verify if the
	// unmarshalling works from a client perspective, specifically
	// while unmarshalling time.Time type for 'Initiated' field.

equations for the respective type parameters.
</p>

<p>
For example, given
</p>

<pre>
// dedup returns a copy of the argument slice with any duplicate entries removed.
func dedup[S ~[]E, E comparable](S) S { … }

type Slice []int
var s Slice
s = dedup(s)   // same as s = dedup[Slice, int](s)
</pre>

<p>

            [] if middleware is None else list(middleware)
        )
        self.middleware_stack: ASGIApp | None = None
        self.setup()

    def build_middleware_stack(self) -> ASGIApp:
        # Duplicate/override from Starlette to add AsyncExitStackMiddleware
        # inside of ExceptionMiddleware, inside of custom user middlewares
        debug = self.debug
        error_handler = None

- Fixed a regression in default 1.26 configurations, which enabled PodDisruptionConditions by default, 
  that prevented the control plane's pod garbage collector from deleting pods that contained duplicated field keys (env. variables with repeated keys or container ports). ([#121381](https://github.com/kubernetes/kubernetes/pull/121381), [@mimowo](https://github.com/mimowo)) [SIG Apps, Auth, Scheduling and Testing]

paragraphs\n//\n// Similarly, the top margin on `<p>`s get reset. However, we also reset the\n// bottom margin to use `rem` units instead of `em`.\np {\n  margin-top: 0;\n  margin-bottom: $paragraph-margin-bottom;\n}\n\n// Abbreviations\n//\n// 1. Duplicate behavior to the data-* attribute for our tooltip plugin\n// 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.\n// 3. Add explicit cursor to indicate changed behavior.\n// 4. Remove the bottom border in Firefox 39-.\n// 5....