unset the manager changes activity feed in SharePoint 2010

We wanted to unset the manager changes activity feed for all the users are in the SharePoint 2010 farm, have used the below code

using System;
using Microsoft.Office.Server;
using Microsoft.Office.Server.UserProfiles;
using Microsoft.SharePoint;
using Microsoft.Office.Server.ActivityFeed;

namespace MysiteActivityOFF
{
    class Program
    {
        static void Main(string[] args)
        {
            SPSecurity.RunWithElevatedPrivileges(delegate()
           {
               string currentSite = "http://weburl";
               using (SPSite aSite = new SPSite(currentSite))
               {
                   SPServiceContext currentContext = SPServiceContext.GetContext(aSite);
                   UserProfileManager userProfMan = new UserProfileManager(currentContext);
                   ActivityType activityType = null;
                   string userName = Environment.UserDomainName + "\\" + Environment.UserName;
                   UserProfile currentUser = userProfMan.GetUserProfile(userName);
                   ActivityManager activityMan = new ActivityManager(currentUser, currentContext);
                   bool rights = activityMan.PrepareToAllowSchemaChanges();<br/>
                   if (rights)
                   {
                       try
                       {
                           activityType = activityMan.ActivityTypes["ManagerChange"];
                           activityType.IsPublished = false;
                           activityType.Commit();
                           activityType.Refresh(true);
                           Console.WriteLine("Manager change activity successfully disabled for user : " + currentUser.DisplayName);
                       }
                       catch (Exception ex)
                       {
                           Console.WriteLine(ex.StackTrace);
                       }
                   }
                   Console.ReadKey(true);
               }
           });
        }
    }
}

however it throws the below error:

ERROR :
=======
In the "activityType.Commit();" line the exception occurs at :

Message :
ActivityManager.ActivityFeedSchemaMapping Exception
Inner Exception :
Procedure or function activityFeed_UpdateActivityTypes has too many arguments specified. StackTrace :
at
Microsoft.Office.Server.ActivityFeed.ActivityFeedSchemaMapping.InsertOrUpdateOne(ActivityFeedSchemaMapping[] mapping, Object obj, String sproc, SqlSession sqlSession, Boolean isInsert)
at Microsoft.Office.Server.ActivityFeed.ActivityType.Commit()

Powershell:<br/>
$loginname = "domain\account";<br/>
$site = get-spsite https://url<br/>
$context = Get-SPServiceContext $site;<br/>
$upm = New-Object Microsoft.Office.Server.UserProfiles.UserProfileManager($context);<br/>
$profile = $upm.GetUserProfile([string]$loginname);<br/>
$am = New-Object Microsoft.Office.Server.ActivityFeed.ActivityManager($profile, $context);<br/>
$am.PrepareToAllowSchemaChanges();<br/>
$mgrChange = $am.ActivityTypes["ManagerChange"];<br/>
$mgrChange.IsPublished = $false<br/>
$mgrChange.Commit()<br/>

Error:

Exception calling "Commit" with "0" argument(s): "ActivityManager.ActivityFeedSchemaMapping Exception" At line:1 char:18 + $mgrChange.Commit <<<< () + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : DotNetMethodException

Update-2:

[void] [System.Reflection.Assembly]::LoadWithPartialName("System") 
$loginname = "domain\user"
$site = Get-SPSite "URL"

$context = Get-SPServiceContext $site;
$upm = New-Object Microsoft.Office.Server.UserProfiles.UserProfileManager($context);
$profile = $upm.GetUserProfile([string]$loginname);

$am = New-Object Microsoft.Office.Server.ActivityFeed.ActivityManager($profile, $context)
$apptList = New-Object System.Collections.Generic.List[Microsoft.Office.Server.ActivityFeed.ActivityPreferencePerType]

$am.ActivityTypes | ForEach-Object {
  $appt = New-Object Microsoft.Office.Server.ActivityFeed.ActivityPreferencePerType
  $appt.ActivityType = $_
  $appt.IsSet = $false
  $apptList.Add($appt)
}
$am.ActivityPreferences.SetActivityPreferencesPerType($apptList)
$am.ActivityPreferences.Commit()
$am.ActivityPreferences.Refresh()

Irrespective of the user, it updates the service account profile(on which logged into the server). what could be the issue?