diff --git a/app/controllers/collections/versions_controller.rb b/app/controllers/collections/versions_controller.rb
index 5d462983..4f0769d3 100644
--- a/app/controllers/collections/versions_controller.rb
+++ b/app/controllers/collections/versions_controller.rb
@@ -95,10 +95,17 @@ def to_review
         last!
 
     authorize! :send_to_review, collection
-    collection.to_review
 
-    collection.save!
-    flash[:success] = t('txt.controllers.versioning.to_review_success')
-    redirect_to collection_path(collection, published: 0)
+    # Only send the concept to review if it is publishable (e.g. consistency check is OK)
+    if collection.publishable?
+      collection.to_review
+
+      collection.save!
+      flash[:success] = t('txt.controllers.versioning.to_review_success')
+      redirect_to collection_path(collection, published: 0)
+    else
+      flash[:error] = t('txt.controllers.versioning.consistency_check_error')
+      redirect_to edit_collection_path(collection, published: 0, full_consistency_check: '1')
+    end
   end
 end
diff --git a/app/controllers/concepts/versions_controller.rb b/app/controllers/concepts/versions_controller.rb
index f3f17bb0..4641a95d 100644
--- a/app/controllers/concepts/versions_controller.rb
+++ b/app/controllers/concepts/versions_controller.rb
@@ -109,10 +109,17 @@ def to_review
         last!
 
     authorize! :send_to_review, concept
-    concept.to_review
 
-    concept.save!
-    flash[:success] = t('txt.controllers.versioning.to_review_success')
-    redirect_to concept_path(published: 0, id: concept)
+    # Only send the concept to review if it is publishable (e.g. consistency check is OK)
+    if concept.publishable?
+      concept.to_review
+      concept.save!
+
+      flash[:success] = t('txt.controllers.versioning.to_review_success')
+      redirect_to concept_path(published: 0, id: concept)
+    else
+      flash[:error] = t('txt.controllers.versioning.consistency_check_error')
+      redirect_to concept_path(published: 0, id: concept, full_consistency_check: '1')
+    end
   end
 end
diff --git a/test/integration/create_concept_test.rb b/test/integration/create_concept_test.rb
index 96222120..5802f899 100644
--- a/test/integration/create_concept_test.rb
+++ b/test/integration/create_concept_test.rb
@@ -30,6 +30,21 @@ class CreateConceptTest < ActionDispatch::IntegrationTest
     save_check_and_publish
   end
 
+  test 'send to review with inconsistent concept' do
+    login('administrator')
+    visit dashboard_path(lang: 'en')
+    click_link_or_button 'New Concept'
+
+    # Create invalid preflabel
+    fill_in 'concept_labelings_by_text_labeling_skos_pref_labels_en', with: 'Foo,Foo'
+    click_link_or_button 'Save'
+
+    # Consistency check should run when sending the concept to review.
+    click_link_or_button 'Send to review'
+    assert page.has_content? 'Instance is inconsistent.'
+    assert page.has_content? 'There must be only one preferred Label per language.'
+  end
+
   private
 
   def save_check_and_publish