diff --git a/app/controllers/knowledge_base/search_controller.rb b/app/controllers/knowledge_base/search_controller.rb
index 580d5dd83..287427524 100644
--- a/app/controllers/knowledge_base/search_controller.rb
+++ b/app/controllers/knowledge_base/search_controller.rb
@@ -85,7 +85,7 @@ class KnowledgeBase::SearchController < ApplicationController
           end
 
     {
-      id:       object.id,
+      id:       object.id.to_s,
       type:     object.class.name,
       icon:     'knowledge-base-answer',
       date:     object.updated_at,
@@ -108,7 +108,7 @@ class KnowledgeBase::SearchController < ApplicationController
           end
 
     {
-      id:       object.id,
+      id:       object.id.to_s,
       type:     object.class.name,
       fontName: object.category.knowledge_base.iconset,
       date:     object.updated_at,
@@ -130,7 +130,7 @@ class KnowledgeBase::SearchController < ApplicationController
           end
 
     {
-      id:    object.id,
+      id:    object.id.to_s,
       type:  object.class.name,
       icon:  'knowledge-base',
       date:  object.updated_at,
diff --git a/app/models/knowledge_base.rb b/app/models/knowledge_base.rb
index 7b989ea06..ea9cd244d 100644
--- a/app/models/knowledge_base.rb
+++ b/app/models/knowledge_base.rb
@@ -121,7 +121,7 @@ class KnowledgeBase < ApplicationModel
       .active
       .joins(:kb_locales)
       .group('knowledge_bases.id')
-      .pluck('COUNT(knowledge_base_locales.id) as locales_count')
+      .pluck(Arel.sql('COUNT(knowledge_base_locales.id) as locales_count'))
       .any? { |e| e > 1 }
   end
 
diff --git a/spec/requests/knowledge_base/search_with_details_spec.rb b/spec/requests/knowledge_base/search_with_details_spec.rb
new file mode 100644
index 000000000..e52823866
--- /dev/null
+++ b/spec/requests/knowledge_base/search_with_details_spec.rb
@@ -0,0 +1,33 @@
+require 'rails_helper'
+
+RSpec.describe 'Knowledge Base search with details', type: :request, searchindex: true do
+  include_context 'basic Knowledge Base'
+
+  before do
+    configure_elasticsearch(required: true, rebuild: true) do
+      published_answer
+    end
+  end
+
+  let(:endpoint) { '/api/v1/knowledge_bases/search' }
+
+  context 'ensure details ID type matches ES ID type' do
+    it 'for answers' do
+      post endpoint, params: { query: published_answer.translations.first.title }
+
+      expect(json_response['details'][0]['id']).to be_a_kind_of String
+    end
+
+    it 'for categories' do
+      post endpoint, params: { query: category.translations.first.title }
+
+      expect(json_response['details'][0]['id']).to be_a_kind_of String
+    end
+
+    it 'for knowledge base' do
+      post endpoint, params: { query: knowledge_base.translations.first.title }
+
+      expect(json_response['details'][0]['id']).to be_a_kind_of String
+    end
+  end
+end
diff --git a/spec/system/ticket/linking_knowledge_base_answer_spec.rb b/spec/system/ticket/linking_knowledge_base_answer_spec.rb
new file mode 100644
index 000000000..a61833e2e
--- /dev/null
+++ b/spec/system/ticket/linking_knowledge_base_answer_spec.rb
@@ -0,0 +1,26 @@
+require 'rails_helper'
+
+RSpec.describe 'linking Knowledge Base answer', type: :system, authenticated: true, searchindex: true do
+  include_context 'basic Knowledge Base'
+
+  before do
+    configure_elasticsearch(required: true, rebuild: true) do
+      published_answer
+    end
+  end
+
+  it do
+    ticket = create :ticket, group: Group.find_by(name: 'Users')
+    visit "#ticket/zoom/#{ticket.id}"
+
+    find(:css, '.active .link_kb_answers .js-add').click
+
+    target_translation = published_answer.translations.first
+
+    find(:css, '.active .link_kb_answers .js-input').send_keys target_translation.title
+
+    find(:css, %(.active .link_kb_answers li[data-value="#{target_translation.id}"])).click
+
+    expect(find(:css, '.active .link_kb_answers ol')).to have_text target_translation.title
+  end
+end