diff --git a/app/models/wiki_page.rb b/app/models/wiki_page.rb
index 988819a..fd8bc06 100644
--- a/app/models/wiki_page.rb
+++ b/app/models/wiki_page.rb
@@ -126,7 +126,7 @@ class WikiPage < ActiveRecord::Base
         child.wiki_id = wiki_id
         child.redirect_existing_links = redirect_existing_links
         unless child.save
-          WikiPage.where(:id => child.id).update_all :parent_nil => nil
+          WikiPage.where(:id => child.id).update_all :parent_id => nil
         end
       end
     end
diff --git a/test/unit/wiki_page_test.rb b/test/unit/wiki_page_test.rb
index 5fb1841..518db07 100644
--- a/test/unit/wiki_page_test.rb
+++ b/test/unit/wiki_page_test.rb
@@ -121,6 +121,24 @@ class WikiPageTest < ActiveSupport::TestCase
     assert_equal parent, child.parent
   end
 
+  def test_move_parent_with_child_with_duplicate_name_should_not_move_child
+    parent = WikiPage.create!(:wiki_id => 1, :title => 'Parent')
+    child = WikiPage.create!(:wiki_id => 1, :title => 'Child', :parent_id => parent.id)
+    parent.reload
+    # page with the same name as the child in the target wiki
+    WikiPage.create!(:wiki_id => 2, :title => 'Child')
+
+    parent.wiki_id = 2
+    parent.save!
+
+    parent.reload
+    assert_equal 2, parent.wiki_id
+
+    child.reload
+    assert_equal 1, child.wiki_id
+    assert_nil child.parent_id
+  end
+
   def test_destroy
     page = WikiPage.find(1)
     page.destroy