aliases: fix bug when trying to move wiki pages.

app/models/tag_alias.rb

@@ -150,7 +150,7 @@ class TagAlias < TagRelationship
     antecedent_wiki = WikiPage.titled(antecedent_name).first
     if antecedent_wiki.present?
       if WikiPage.titled(consequent_name).blank?
-        antecedent_wiki.update!(title: consequent_name, skip_secondary_validations: true)
+        antecedent_wiki.update!(title: consequent_name)
       else
         forum_updater.update(conflict_message)
       end

test/unit/tag_alias_test.rb

@@ -160,6 +160,16 @@ class TagAliasTest < ActiveSupport::TestCase
       end
     end
 
+    should "move existing wikis" do
+      wiki = create(:wiki_page, title: "aaa")
+      ta = create(:tag_alias, antecedent_name: "aaa", consequent_name: "bbb", status: "pending")
+
+      ta.approve!(approver: @admin)
+      perform_enqueued_jobs
+
+      assert_equal("bbb", wiki.reload.title)
+    end
+
     should "move existing aliases" do
       ta1 = FactoryBot.create(:tag_alias, :antecedent_name => "aaa", :consequent_name => "bbb", :status => "pending")
       ta2 = FactoryBot.create(:tag_alias, :antecedent_name => "bbb", :consequent_name => "ccc", :status => "pending")