diff --git a/app/models/concerns/has_groups.rb b/app/models/concerns/has_groups.rb
index 9896ee3f0..a4f953458 100644
--- a/app/models/concerns/has_groups.rb
+++ b/app/models/concerns/has_groups.rb
@@ -303,7 +303,7 @@ module HasGroups
       instances = joins(group_through.name)
                   .where( group_through.table_name => { group_id: group_id, access: access }, active: true )
 
-      if respond_to?(:permissions?)
+      if method_defined?(:permissions?)
         permissions = Permission.with_parents('ticket.agent')
         instances = instances
                     .joins(roles: :permissions)
diff --git a/test/unit/user_test.rb b/test/unit/user_test.rb
index c541aac87..5dc194b27 100644
--- a/test/unit/user_test.rb
+++ b/test/unit/user_test.rb
@@ -866,4 +866,50 @@ class UserTest < ActiveSupport::TestCase
     assert_equal(1, admin_count_inital)
   end
 
+  test 'only valid agent in group permission check' do
+    name = rand(999_999_999)
+    group = Group.create!(
+      name: "ValidAgentGroupPermission-#{name}",
+      active: true,
+      updated_by_id: 1,
+      created_by_id: 1,
+    )
+    roles  = Role.where(name: 'Agent')
+    agent1 = User.create_or_update(
+      login: "agent-default-vaild_agent_group_permission-1#{name}@example.com",
+      firstname: 'vaild_agent_group_permission-1',
+      lastname: "Agent#{name}",
+      email: "agent-default-vaild_agent_group_permission-1#{name}@example.com",
+      password: 'agentpw',
+      active: true,
+      roles: roles,
+      groups: [group],
+      updated_by_id: 1,
+      created_by_id: 1,
+    )
+    agent2 = User.create_or_update(
+      login: "agent-default-vaild_agent_group_permission-2#{name}@example.com",
+      firstname: 'vaild_agent_group_permission-2',
+      lastname: "Agent#{name}",
+      email: "agent-default-vaild_agent_group_permission-2#{name}@example.com",
+      password: 'agentpw',
+      active: true,
+      roles: roles,
+      groups: [group],
+      updated_by_id: 1,
+      created_by_id: 1,
+    )
+    assert_equal(2, User.group_access(group.id, 'full').count)
+    agent2.active = false
+    agent2.save!
+    assert_equal(1, User.group_access(group.id, 'full').count)
+    agent2.active = true
+    agent2.save!
+    assert_equal(2, User.group_access(group.id, 'full').count)
+    roles = Role.where(name: 'Customer')
+    agent2.roles = roles
+    agent2.save!
+    assert_equal(1, User.group_access(group.id, 'full').count)
+  end
+
 end