Updating MobileDeviceConfigurationProfile returns Http 409

I'm currently trying to update Mobile Device Configuration
Profiles' exclusions scope

In order to do this, the following steps are being taken:

1. Read the Mobiledeviceconfigurationprofile (in XML).
2. Modify that configuration profile (Add a mobiledevicedevice to the exclusions/mobiledevices scope).
3. Use that updated profile as the body for the PUT request when updating a profile.

After these actions I get a Http 409 status code returned :

Note: The code examples below have been modified for easy reading. so for example, exception handling is not included.

Example C# Code

    //Service Declaration
    JSSApi.MdmInterfaceClient AppleApi = new JSSApi.MdmInterfaceClient();

    //Read the Profile - Scroll down to see response
    var XmlProfileResponse = AppleApi.ReadMobileConfigurationProfile(mConfig.Id.ToString(), inXML:true);

    XElement XmlDocX = XElement.Parse(XmlProfileResponse);
    XmlDocX.Element("scope").Element("exclusions").Element("mobile_devices")
                    .Add(new XElement("mobile_device", 
                    new XElement("id", "#MyMobileDeviceID#"), 
                    new XElement("name", "#MyMobileDeviceName#"), 
                    new XElement("udid", "#MyMobileDeviceUDID#")));

    AppleApi.UpdateMobileConfigurationProfile(mConfig.Id.ToString(), XmlDocX.ToString());

XmlProfileResponse

<configuration_profile>
      <general>
        <id>1</id>
        <name>NoCamera</name>
        <description/>
        <site>
          <id>-1</id>
          <name>None</name>
        </site>
        <category>
          <id>-1</id>
          <name>No category assigned</name>
        </category>
        <uuid>E49F0270-85A7-440C-A719-D7B98CEC0D7D</uuid>
        <deployment_method>Install Automatically</deployment_method>
        <redeploy_on_update>Newly Assigned</redeploy_on_update>
        <redeploy_days_before_certificate_expires>0</redeploy_days_before_certificate_expires>
        <payloads><?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1"><dict><key>PayloadUUID</key><string>E49F0270-85A7-440C-A719-D7B98CEC0D7D</string><key>PayloadType</key><string>Configuration</string><key>PayloadOrganization</key><string>Actacom Demo</string><key>PayloadIdentifier</key><string>E49F0270-85A7-440C-A719-D7B98CEC0D7D</string><key>PayloadDisplayName</key><string>NoCamera</string><key>PayloadDescription</key><string/><key>PayloadVersion</key><integer>1</integer><key>PayloadEnabled</key><true/><key>PayloadRemovalDisallowed</key><true/><key>PayloadContent</key><array><dict><key>PayloadUUID</key><string>790126EB-5B0F-4943-B92C-2FDBDE8948E1</string><key>PayloadType</key><string>com.apple.applicationaccess</string><key>PayloadOrganization</key><string>Actacom Demo</string><key>PayloadIdentifier</key><string>790126EB-5B0F-4943-B92C-2FDBDE8948E1</string><key>PayloadDisplayName</key><string>com.apple.applicationaccess</string><key>PayloadDescription</key><string/><key>PayloadVersion</key><integer>1</integer><key>PayloadEnabled</key><true/><key>ratingRegion</key><string>us</string><key>ratingTVShows</key><integer>1000</integer><key>ratingMovies</key><integer>1000</integer><key>ratingApps</key><integer>1000</integer><key>safariAllowJavaScript</key><true/><key>safariAllowAutoFill</key><true/><key>safariForceFraudWarning</key><false/><key>safariAllowPopups</key><true/><key>safariAcceptCookies</key><integer>2</integer><key>allowDiagnosticSubmission</key><true/><key>forceEncryptedBackup</key><false/><key>allowVoiceDialing</key><true/><key>allowVideoConferencing</key><true/><key>allowInAppPurchases</key><true/><key>allowGlobalBackgroundFetchWhenRoaming</key><true/><key>allowSafari</key><true/><key>allowiTunes</key><true/><key>allowYouTube</key><true/><key>allowScreenShot</key><true/><key>allowExplicitContent</key><true/><key>allowCamera</key><false/><key>allowAppInstallation</key><true/><key>allowAppRemoval</key><true/><key>allowAssistant</key><true/><key>allowGameCenter</key><true/><key>allowMultiplayerGaming</key><true/><key>allowAddingGameCenterFriends</key><true/><key>forceITunesStorePasswordEntry</key><false/><key>allowUntrustedTLSPrompt</key><true/><key>allowCloudBackup</key><true/><key>allowCloudDocumentSync</key><true/><key>allowPhotoStream</key><true/><key>allowAssistantWhileLocked</key><true/><key>forceAssistantProfanityFilter</key><false/><key>allowSharedStream</key><true/><key>allowPassbookWhileLocked</key><true/><key>allowUIConfigurationProfileInstallation</key><true/><key>allowBookstore</key><true/><key>allowBookstoreErotica</key><true/><key>allowChat</key><true/><key>allowCloudKeychainSync</key><true/><key>allowAccountModification</key><true/><key>allowFindMyFriendsModification</key><true/><key>allowOpenFromManagedToUnmanaged</key><true/><key>allowOpenFromUnmanagedToManaged</key><true/><key>allowLockScreenControlCenter</key><true/><key>allowLockScreenControlCenter</key><true/><key>allowLockScreenNotificationsView</key><true/><key>allowLockScreenTodayView</key><true/><key>allowAssistantUserGeneratedContent</key><true/><key>allowAirDrop</key><true/><key>allowAppCellularDataModification</key><true/><key>allowFingerprintForUnlock</key><true/><key>allowOTAPKIUpdates</key><true/><key>allowHostPairing</key><true/><key>forceAirPlayOutgoingRequestsPairingPassword</key><false/><key>forceAirPlayIncomingRequestsPairingPassword</key><false/><key>forceLimitAdTracking</key><false/><key>allowManagedAppsCloudSync</key><true/><key>allowEraseContentAndSettings</key><true/><key>allowSpotlightInternetResults</key><true/><key>allowEnablingRestrictions</key><true/><key>allowActivityContinuation</key><true/><key>allowEnterpriseBookBackup</key><true/><key>allowEnterpriseBookMetadataSync</key><true/><key>allowPodcasts</key><true/><key>allowPredictiveKeyboard</key><true/><key>allowAutoCorrection</key><true/><key>allowSpellCheck</key><true/><key>allowDefinitionLookup</key><true/></dict></array></dict></plist></payloads>
      </general>
      <scope>
        <all_mobile_devices>false</all_mobile_devices>
        <mobile_devices/>
        <mobile_device_groups>
          <mobile_device_group>
            <id>5</id>
            <name>DevGroup01</name>
          </mobile_device_group>
        </mobile_device_groups>
        <buildings/>
        <departments/>
        <limitations>
          <users/>
          <user_groups/>
          <network_segments/>
          <ibeacons/>
        </limitations>
        <exclusions>
          <mobile_devices/>
          <mobile_device_groups/>
          <buildings/>
          <departments/>
          <users/>
          <user_groups/>
          <network_segments/>
          <ibeacons/>
        </exclusions>
      </scope>
      <self_service>
        <self_service_description/>
        <security>
          <removal_disallowed>Never</removal_disallowed>
        </security>
        <self_service_icon/>
        <feature_on_main_page>false</feature_on_main_page>
        <self_service_categories/>
      </self_service>
    </configuration_profile>