diff --git a/app/models/post.rb b/app/models/post.rb
index 6cf017458..7d22dac16 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -3,7 +3,7 @@ class Post < ActiveRecord::Base
   class DisapprovalError < Exception ; end
   class SearchError < Exception ; end
 
-  attr_accessor :old_tag_string, :old_parent_id, :has_constraints
+  attr_accessor :old_tag_string, :old_parent_id, :has_constraints, :disable_versioning
   after_destroy :delete_files
   after_destroy :delete_remote_files
   after_save :create_version
@@ -868,6 +868,8 @@ class Post < ActiveRecord::Base
 
   module VersionMethods
     def create_version
+      return if disable_versioning
+
       if created_at == updated_at
         CurrentUser.increment!(:post_update_count)
         versions.create(
diff --git a/app/models/tag_alias.rb b/app/models/tag_alias.rb
index 019afcbd3..40b7695a6 100644
--- a/app/models/tag_alias.rb
+++ b/app/models/tag_alias.rb
@@ -130,6 +130,7 @@ class TagAlias < ActiveRecord::Base
       escaped_antecedent_name = Regexp.escape(antecedent_name)
       fixed_tags = post.tag_string.sub(/(?:\A| )#{escaped_antecedent_name}(?:\Z| )/, " #{consequent_name} ").strip
       CurrentUser.scoped(creator, creator_ip_addr) do
+        post.disable_versioning = true
         post.update_attributes(
           :tag_string => fixed_tags
         )
diff --git a/app/models/tag_implication.rb b/app/models/tag_implication.rb
index f47e47084..726c3dc74 100644
--- a/app/models/tag_implication.rb
+++ b/app/models/tag_implication.rb
@@ -125,6 +125,7 @@ class TagImplication < ActiveRecord::Base
       escaped_antecedent_name = Regexp.escape(antecedent_name)
       fixed_tags = post.tag_string.sub(/(?:\A| )#{escaped_antecedent_name}(?:\Z| )/, " #{antecedent_name} #{descendant_names} ").strip
       CurrentUser.scoped(creator, creator_ip_addr) do
+        post.disable_versioning = true
         post.update_attributes(
           :tag_string => fixed_tags
         )
diff --git a/test/unit/tag_alias_test.rb b/test/unit/tag_alias_test.rb
index aab84adad..786b8fcaa 100644
--- a/test/unit/tag_alias_test.rb
+++ b/test/unit/tag_alias_test.rb
@@ -62,18 +62,6 @@ class TagAliasTest < ActiveSupport::TestCase
       end
     end
 
-    should "record the alias's creator in the tag history" do
-      uploader = FactoryGirl.create(:user)
-      post = nil
-      CurrentUser.scoped(uploader, "127.0.0.1") do
-        post = FactoryGirl.create(:post, :tag_string => "aaa bbb ccc")
-      end
-      tag_alias = FactoryGirl.create(:tag_alias, :antecedent_name => "aaa", :consequent_name => "xxx")
-      post.reload
-      assert_not_equal(tag_alias.creator_id, post.uploader_id)
-      assert_equal(tag_alias.creator_id, post.versions.last.updater_id)
-    end
-
     should "push the antecedent's category to the consequent" do
       tag1 = FactoryGirl.create(:tag, :name => "aaa", :category => 1)
       tag2 = FactoryGirl.create(:tag, :name => "bbb")
diff --git a/test/unit/tag_implication_test.rb b/test/unit/tag_implication_test.rb
index 19f52e640..e8ac6670b 100644
--- a/test/unit/tag_implication_test.rb
+++ b/test/unit/tag_implication_test.rb
@@ -107,17 +107,5 @@ class TagImplicationTest < ActiveSupport::TestCase
       p1.reload
       assert_equal("aaa bbb ccc xxx yyy", p1.tag_string)
     end
-
-    should "record the implication's creator in the tag history" do
-      user = FactoryGirl.create(:user)
-      p1 = nil
-      CurrentUser.scoped(user, "127.0.0.1") do
-        p1 = FactoryGirl.create(:post, :tag_string => "aaa bbb ccc")
-      end
-      ti1 = FactoryGirl.create(:tag_implication, :antecedent_name => "aaa", :consequent_name => "xxx")
-      p1.reload
-      assert_not_equal(ti1.creator_id, p1.uploader_id)
-      assert_equal(ti1.creator_id, p1.versions.last.updater_id)
-    end
   end
 end