diff --git a/pkg/serving/v1/client.go b/pkg/serving/v1/client.go
index e2f9765a1..cfca0847c 100644
--- a/pkg/serving/v1/client.go
+++ b/pkg/serving/v1/client.go
@@ -378,6 +378,13 @@ func getBaseRevision(cl KnServingClient, service *servingv1.Service) (*servingv1
 
 // Delete a revision by name
 func (cl *knServingClient) DeleteRevision(name string, timeout time.Duration) error {
+	revision, err := cl.client.Revisions(cl.namespace).Get(name, v1.GetOptions{})
+	if err != nil {
+		return clienterrors.GetError(err)
+	}
+	if revision.GetDeletionTimestamp() != nil {
+		return fmt.Errorf("can't delete revision '%s' because it has been already marked for deletion", name)
+	}
 	if timeout == 0 {
 		return cl.deleteRevision(name)
 	}
@@ -387,7 +394,7 @@ func (cl *knServingClient) DeleteRevision(name string, timeout time.Duration) er
 		err, _ := waitForEvent.Wait(name, wait.Options{Timeout: &timeout}, wait.NoopMessageCallback())
 		waitC <- err
 	}()
-	err := cl.deleteRevision(name)
+	err = cl.deleteRevision(name)
 	if err != nil {
 		return clienterrors.GetError(err)
 	}