diff --git a/pkg/apis/eventing/v1/trigger_validation_test.go b/pkg/apis/eventing/v1/trigger_validation_test.go
index 392e3b7df47..41732657241 100644
--- a/pkg/apis/eventing/v1/trigger_validation_test.go
+++ b/pkg/apis/eventing/v1/trigger_validation_test.go
@@ -23,6 +23,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	eventingduckv1 "knative.dev/eventing/pkg/apis/duck/v1"
 	"knative.dev/pkg/apis"
 	duckv1 "knative.dev/pkg/apis/duck/v1"
 )
@@ -60,6 +61,7 @@ var (
 )
 
 func TestTriggerValidation(t *testing.T) {
+	invalidString := "invalid time"
 	tests := []struct {
 		name string
 		t    *Trigger
@@ -258,7 +260,22 @@ func TestTriggerValidation(t *testing.T) {
 				Message: `The provided injection annotation is only used for default broker, but non-default broker specified here: "test-broker"`,
 			},
 		},
-	}
+		{
+			name: "invalid delivery, invalid delay string",
+			t: &Trigger{
+				ObjectMeta: v1.ObjectMeta{
+					Namespace: "test-ns",
+				},
+				Spec: TriggerSpec{
+					Broker:     "test_broker",
+					Filter:     validEmptyFilter,
+					Subscriber: validSubscriber,
+					Delivery: &eventingduckv1.DeliverySpec{
+						BackoffDelay: &invalidString,
+					},
+				}},
+			want: apis.ErrInvalidValue(invalidString, "spec.delivery.backoffDelay"),
+		}}
 
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
@@ -271,6 +288,7 @@ func TestTriggerValidation(t *testing.T) {
 }
 
 func TestTriggerSpecValidation(t *testing.T) {
+	invalidString := "invalid time"
 	tests := []struct {
 		name string
 		ts   *TriggerSpec
@@ -385,6 +403,17 @@ func TestTriggerSpecValidation(t *testing.T) {
 			Subscriber: validSubscriber,
 		},
 		want: &apis.FieldError{},
+	}, {
+		name: "invalid delivery, invalid delay string",
+		ts: &TriggerSpec{
+			Broker:     "test_broker",
+			Filter:     validEmptyFilter,
+			Subscriber: validSubscriber,
+			Delivery: &eventingduckv1.DeliverySpec{
+				BackoffDelay: &invalidString,
+			},
+		},
+		want: apis.ErrInvalidValue(invalidString, "delivery.backoffDelay"),
 	}}
 
 	for _, test := range tests {
diff --git a/pkg/apis/eventing/v1beta1/trigger_conversion.go b/pkg/apis/eventing/v1beta1/trigger_conversion.go
index f311d2ef8ad..52c02d39de4 100644
--- a/pkg/apis/eventing/v1beta1/trigger_conversion.go
+++ b/pkg/apis/eventing/v1beta1/trigger_conversion.go
@@ -20,8 +20,7 @@ import (
 	"context"
 	"fmt"
 
-	duckv1 "knative.dev/eventing/pkg/apis/duck/v1"
-	duckv1beta1 "knative.dev/eventing/pkg/apis/duck/v1beta1"
+	eventingduckv1 "knative.dev/eventing/pkg/apis/duck/v1"
 	v1 "knative.dev/eventing/pkg/apis/eventing/v1"
 	"knative.dev/pkg/apis"
 )
@@ -42,10 +41,8 @@ func (source *Trigger) ConvertTo(ctx context.Context, to apis.Convertible) error
 			}
 		}
 		if source.Spec.Delivery != nil {
-			sink.Spec.Delivery = &duckv1.DeliverySpec{}
-			if err := source.Spec.Delivery.ConvertTo(ctx, sink.Spec.Delivery); err != nil {
-				return err
-			}
+			sink.Spec.Delivery = &eventingduckv1.DeliverySpec{}
+			source.Spec.Delivery.DeepCopyInto(sink.Spec.Delivery)
 		}
 		sink.Status.Status = source.Status.Status
 		sink.Status.SubscriberURI = source.Status.SubscriberURI
@@ -72,10 +69,8 @@ func (sink *Trigger) ConvertFrom(ctx context.Context, from apis.Convertible) err
 			}
 		}
 		if source.Spec.Delivery != nil {
-			sink.Spec.Delivery = &duckv1beta1.DeliverySpec{}
-			if err := sink.Spec.Delivery.ConvertFrom(ctx, source.Spec.Delivery); err != nil {
-				return err
-			}
+			sink.Spec.Delivery = &eventingduckv1.DeliverySpec{}
+			source.Spec.Delivery.DeepCopyInto(sink.Spec.Delivery)
 		}
 		sink.Status.Status = source.Status.Status
 		sink.Status.SubscriberURI = source.Status.SubscriberURI
diff --git a/pkg/apis/eventing/v1beta1/trigger_types.go b/pkg/apis/eventing/v1beta1/trigger_types.go
index e4f0da375ee..49b5d04b47f 100644
--- a/pkg/apis/eventing/v1beta1/trigger_types.go
+++ b/pkg/apis/eventing/v1beta1/trigger_types.go
@@ -23,7 +23,7 @@ import (
 	duckv1 "knative.dev/pkg/apis/duck/v1"
 	"knative.dev/pkg/kmeta"
 
-	eventingduckv1beta1 "knative.dev/eventing/pkg/apis/duck/v1beta1"
+	eventingduckv1 "knative.dev/eventing/pkg/apis/duck/v1"
 )
 
 const (
@@ -92,7 +92,7 @@ type TriggerSpec struct {
 
 	// Delivery contains the delivery spec for this specific trigger.
 	// +optional
-	Delivery *eventingduckv1beta1.DeliverySpec `json:"delivery,omitempty"`
+	Delivery *eventingduckv1.DeliverySpec `json:"delivery,omitempty"`
 }
 
 type TriggerFilter struct {
diff --git a/pkg/apis/eventing/v1beta1/trigger_validation_test.go b/pkg/apis/eventing/v1beta1/trigger_validation_test.go
index 81b96931080..6dc98ee3afd 100644
--- a/pkg/apis/eventing/v1beta1/trigger_validation_test.go
+++ b/pkg/apis/eventing/v1beta1/trigger_validation_test.go
@@ -23,6 +23,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	eventingduckv1 "knative.dev/eventing/pkg/apis/duck/v1"
 	"knative.dev/pkg/apis"
 	duckv1 "knative.dev/pkg/apis/duck/v1"
 )
@@ -59,6 +60,7 @@ var (
 )
 
 func TestTriggerValidation(t *testing.T) {
+	invalidString := "invalid time"
 	tests := []struct {
 		name string
 		t    *Trigger
@@ -214,6 +216,21 @@ func TestTriggerValidation(t *testing.T) {
 				Paths:   []string{injectionAnnotationPath},
 				Message: `The provided injection annotation value can only be "enabled" or "disabled", not "wut"`,
 			},
+		}, {
+			name: "invalid delivery, invalid delay string",
+			t: &Trigger{
+				ObjectMeta: v1.ObjectMeta{
+					Namespace: "test-ns",
+				},
+				Spec: TriggerSpec{
+					Broker:     "test_broker",
+					Filter:     validEmptyFilter,
+					Subscriber: validSubscriber,
+					Delivery: &eventingduckv1.DeliverySpec{
+						BackoffDelay: &invalidString,
+					},
+				}},
+			want: apis.ErrInvalidValue(invalidString, "spec.delivery.backoffDelay"),
 		},
 	}
 
@@ -228,6 +245,8 @@ func TestTriggerValidation(t *testing.T) {
 }
 
 func TestTriggerSpecValidation(t *testing.T) {
+	invalidString := "invalid time"
+
 	tests := []struct {
 		name string
 		ts   *TriggerSpec
@@ -342,6 +361,17 @@ func TestTriggerSpecValidation(t *testing.T) {
 			Subscriber: validSubscriber,
 		},
 		want: &apis.FieldError{},
+	}, {
+		name: "invalid delivery, invalid delay string",
+		ts: &TriggerSpec{
+			Broker:     "test_broker",
+			Filter:     validEmptyFilter,
+			Subscriber: validSubscriber,
+			Delivery: &eventingduckv1.DeliverySpec{
+				BackoffDelay: &invalidString,
+			},
+		},
+		want: apis.ErrInvalidValue(invalidString, "delivery.backoffDelay"),
 	}}
 
 	for _, test := range tests {
diff --git a/pkg/apis/eventing/v1beta1/zz_generated.deepcopy.go b/pkg/apis/eventing/v1beta1/zz_generated.deepcopy.go
index fb5af442b8c..893233786c9 100644
--- a/pkg/apis/eventing/v1beta1/zz_generated.deepcopy.go
+++ b/pkg/apis/eventing/v1beta1/zz_generated.deepcopy.go
@@ -22,6 +22,7 @@ package v1beta1
 
 import (
 	runtime "k8s.io/apimachinery/pkg/runtime"
+	duckv1 "knative.dev/eventing/pkg/apis/duck/v1"
 	duckv1beta1 "knative.dev/eventing/pkg/apis/duck/v1beta1"
 	apis "knative.dev/pkg/apis"
 	v1 "knative.dev/pkg/apis/duck/v1"
@@ -353,7 +354,7 @@ func (in *TriggerSpec) DeepCopyInto(out *TriggerSpec) {
 	in.Subscriber.DeepCopyInto(&out.Subscriber)
 	if in.Delivery != nil {
 		in, out := &in.Delivery, &out.Delivery
-		*out = new(duckv1beta1.DeliverySpec)
+		*out = new(duckv1.DeliverySpec)
 		(*in).DeepCopyInto(*out)
 	}
 	return