Hi,

There should be no need to go into the database.

As you mentioned, step 1 is to update in code and remove CultureSpecificAttribute from the property.

Step 2 would be to go into the admin UI, select the "Content Type" tab, locate your content type and edit the property. You can then either click "Revert to default" (reverts to the default settings as per the code) or uncheck "Unique value per language", afterwards click Save.

Further information is in the documentation, see "Editing a Property" under Properties.

Thank you Jake for the response and time spent.

I agree with the above answer, however, We have to make the above changes in more than 5 environments, and around 60+ content properties need to be updated, so it's very difficult and time taking process to update in all environments and all properties.

My bad, I missed mentioning this information in the initial post.

Got you. Then I'd probably do it as an IMigrationStep, that way you could be sure it went out to every environment in a controlled way.

You'd want something like this:

[ServiceConfiguration(typeof(IMigrationStep))]
public class DelocalizePropertiesMigrationStep : IMigrationStep
{
	public int Order => 1;
	public string Name => "Delocalize CMS Properties.";
	public string Description => "This migration removes the option to localize numerous CMS properties.";

	private readonly IContentTypeRepository _contentTypeRepository;
	private readonly IPropertyDefinitionRepository _propertyDefinitionRepository;

	public DelocalizePropertiesMigrationStep(IContentTypeRepository contentTypeRepository, IPropertyDefinitionRepository propertyDefinitionRepository)
	{
		_contentTypeRepository = contentTypeRepository;
		_propertyDefinitionRepository = propertyDefinitionRepository;
	}

	public bool Execute(IProgressMessenger progressMessenger)
	{
		ICollection<(Type ModelType, string PropertyName)> properties = new List<(Type, string)>
		{
			(typeof(StartPageType), nameof(StartPageType.Example))
		};

		var pos = 0;

		foreach (var (modelType, propertyName) in properties)
		{
			var success = false;

			try
			{
				success = TryDelocalizeProperty(modelType, propertyName);
			}
			catch (Exception ex)
			{
				// Log
			}

			++pos;

			progressMessenger.AddProgressMessageText($"{(success ? "Success:" : "Fail:")} {propertyName} on {modelType.Name}.", !success, (int)((100.0 * pos) / properties.Count));
		}

		return true;
	}

	private bool TryDelocalizeProperty(Type modelType, string propertyName)
	{
		var contentType = _contentTypeRepository.Load(modelType);

		if (contentType == null)
		{
			return false;
		}

		var propertyDefinition = _propertyDefinitionRepository.List(contentType.ID).SingleOrDefault(x => x.Name == propertyName);

		if (propertyDefinition == null || !propertyDefinition.LanguageSpecific)
		{
			return false;
		}

		propertyDefinition = propertyDefinition.CreateWritableClone();

		propertyDefinition.LanguageSpecific = false;

		_propertyDefinitionRepository.Save(propertyDefinition);

		return true;
	}
}