diff --git a/pkg/scheduler/api/validation/validation.go b/pkg/scheduler/api/validation/validation.go
index 37367f1946c..82d8ba43115 100644
--- a/pkg/scheduler/api/validation/validation.go
+++ b/pkg/scheduler/api/validation/validation.go
@@ -89,7 +89,7 @@ func validatePriorityRedeclared(priorities map[string]schedulerapi.PriorityPolic
 			return fmt.Errorf("No priority arguments set for priority %s", priority.Name)
 		}
 		if existing, alreadyDeclared := priorities[priorityType]; alreadyDeclared {
-			return fmt.Errorf("Priority %s is redeclared (was %+v)", priority.Name, existing)
+			return fmt.Errorf("Priority '%s' redeclares custom priority '%s', from:'%s'", priority.Name, priorityType, existing.Name)
 		}
 		priorities[priorityType] = priority
 	}
@@ -109,7 +109,7 @@ func validatePredicateRedeclared(predicates map[string]schedulerapi.PredicatePol
 			return fmt.Errorf("No priority arguments set for priority %s", predicate.Name)
 		}
 		if existing, alreadyDeclared := predicates[predicateType]; alreadyDeclared {
-			return fmt.Errorf("Priority %s is redeclared (was %+v)", predicate.Name, existing)
+			return fmt.Errorf("Predicate '%s' redeclares custom predicate '%s', from:'%s'", predicate.Name, predicateType, existing.Name)
 		}
 		predicates[predicateType] = predicate
 	}
diff --git a/pkg/scheduler/api/validation/validation_test.go b/pkg/scheduler/api/validation/validation_test.go
index af2d14f303d..2f4dfc4ab8d 100644
--- a/pkg/scheduler/api/validation/validation_test.go
+++ b/pkg/scheduler/api/validation/validation_test.go
@@ -102,6 +102,26 @@ func TestValidatePolicy(t *testing.T) {
 				}},
 			expected: errors.New("kubernetes.io/foo is an invalid extended resource name"),
 		},
+		{
+			name: "invalid redeclared custom predicate",
+			policy: api.Policy{
+				Predicates: []api.PredicatePolicy{
+					{Name: "customPredicate1", Argument: &api.PredicateArgument{ServiceAffinity: &api.ServiceAffinity{Labels: []string{"label1"}}}},
+					{Name: "customPredicate2", Argument: &api.PredicateArgument{ServiceAffinity: &api.ServiceAffinity{Labels: []string{"label2"}}}},
+				},
+			},
+			expected: errors.New("Predicate 'customPredicate2' redeclares custom predicate 'ServiceAffinity', from:'customPredicate1'"),
+		},
+		{
+			name: "invalid redeclared custom priority",
+			policy: api.Policy{
+				Priorities: []api.PriorityPolicy{
+					{Name: "customPriority1", Weight: 1, Argument: &api.PriorityArgument{ServiceAntiAffinity: &api.ServiceAntiAffinity{Label: "label1"}}},
+					{Name: "customPriority2", Weight: 1, Argument: &api.PriorityArgument{ServiceAntiAffinity: &api.ServiceAntiAffinity{Label: "label2"}}},
+				},
+			},
+			expected: errors.New("Priority 'customPriority2' redeclares custom priority 'ServiceAntiAffinity', from:'customPriority1'"),
+		},
 	}
 
 	for _, test := range tests {