diff --git a/pkg/apis/scheduling/v1alpha1/zz_generated.validations.go b/pkg/apis/scheduling/v1alpha1/zz_generated.validations.go
index 7d5ef6b7568..437c1f2d7db 100644
--- a/pkg/apis/scheduling/v1alpha1/zz_generated.validations.go
+++ b/pkg/apis/scheduling/v1alpha1/zz_generated.validations.go
@@ -306,6 +306,10 @@ func Validate_WorkloadSpec(ctx context.Context, op operation.Operation, fldPath
 			}
 			// call field-attached validations
 			earlyReturn := false
+			if e := validate.MaxItems(ctx, op, fldPath, obj, oldObj, 8); len(e) != 0 {
+				errs = append(errs, e...)
+				earlyReturn = true
+			}
 			if e := validate.RequiredSlice(ctx, op, fldPath, obj, oldObj); len(e) != 0 {
 				errs = append(errs, e...)
 				earlyReturn = true
@@ -313,8 +317,10 @@ func Validate_WorkloadSpec(ctx context.Context, op operation.Operation, fldPath
 			if earlyReturn {
 				return // do not proceed
 			}
+			// lists with map semantics require unique keys
+			errs = append(errs, validate.Unique(ctx, op, fldPath, obj, oldObj, func(a schedulingv1alpha1.PodGroup, b schedulingv1alpha1.PodGroup) bool { return a.Name == b.Name })...)
 			// iterate the list and call the type's validation function
-			errs = append(errs, validate.EachSliceVal(ctx, op, fldPath, obj, oldObj, nil, nil, Validate_PodGroup)...)
+			errs = append(errs, validate.EachSliceVal(ctx, op, fldPath, obj, oldObj, func(a schedulingv1alpha1.PodGroup, b schedulingv1alpha1.PodGroup) bool { return a.Name == b.Name }, validate.SemanticDeepEqual, Validate_PodGroup)...)
 			return
 		}(fldPath.Child("podGroups"), obj.PodGroups, safe.Field(oldObj, func(oldObj *schedulingv1alpha1.WorkloadSpec) []schedulingv1alpha1.PodGroup { return oldObj.PodGroups }), oldObj != nil)...)
 
diff --git a/staging/src/k8s.io/api/scheduling/v1alpha1/generated.proto b/staging/src/k8s.io/api/scheduling/v1alpha1/generated.proto
index 64c78ddb7c1..63c022b6eb4 100644
--- a/staging/src/k8s.io/api/scheduling/v1alpha1/generated.proto
+++ b/staging/src/k8s.io/api/scheduling/v1alpha1/generated.proto
@@ -194,6 +194,9 @@ message WorkloadSpec {
   // +k8s:required
   // +listType=map
   // +listMapKey=name
+  // +k8s:listType=map
+  // +k8s:listMapKey=name
+  // +k8s:maxItems=8
   repeated PodGroup podGroups = 2;
 }
 
diff --git a/staging/src/k8s.io/api/scheduling/v1alpha1/types.go b/staging/src/k8s.io/api/scheduling/v1alpha1/types.go
index 14a29378854..a3b0a91e098 100644
--- a/staging/src/k8s.io/api/scheduling/v1alpha1/types.go
+++ b/staging/src/k8s.io/api/scheduling/v1alpha1/types.go
@@ -128,6 +128,9 @@ type WorkloadSpec struct {
 	// +k8s:required
 	// +listType=map
 	// +listMapKey=name
+	// +k8s:listType=map
+	// +k8s:listMapKey=name
+	// +k8s:maxItems=8
 	PodGroups []PodGroup `json:"podGroups" protobuf:"bytes,2,rep,name=podGroups"`
 }