Hi Johan.

The history cleanup is introduced in 8.18.0.

But if you can't upgrade, then unversion as Roy is suggesting is working like a charm.

If you just wanna do a simple cleanup, where you remove all versions except the last 4. Then you can do this.

public class UnVersionComponent : IComponent
{
    private readonly ILogger _logger;
    private readonly IContentService _contentService;

    public UnVersionComponent(ILogger logger, IContentService contentService)
    {
        _logger = logger;
        _contentService = contentService;
    }

    public void Initialize()
    {
        ContentService.Published += ContentService_Published;
    }

    private void ContentService_Published(global::Umbraco.Core.Services.IContentService sender, global::Umbraco.Core.Events.ContentPublishedEventArgs e)
    {
        foreach (var content in e.PublishedEntities)
        {
            var allVersionsToDelete = _contentService.GetVersionsSlim(content.Id, 4, int.MaxValue).ToList();
            foreach (var version in allVersionsToDelete)
            {
                _logger.Debug<UnVersionComponent>("Deleting version id {VersionId} of content id {ContentId}", version.Id, content.Id);
                _contentService.DeleteVersion(content.Id, version.Id, false);
            }
        }
    }

    public void Terminate() { }
}