To reduce page load times and improve responsiveness of busy sites, many Magento or WooCommerce stores are equipped with one or more caching solutions. These may be built-in tools or third-party apps, plugins, or extensions that each work in slightly different ways.
By caching store and site content, you make it easier for that same content to be delivered to other browsers. While page and content caches do help a lot with ensuring speedy and reliable page delivery, they can also present some other challenges.
What the error means:
If you're getting a "cache duration exceeded" error in SKULabs, this means your store's server or API is returning old order data. This can be detrimental to your fulfillment process, since SKULabs will be unable to see new orders for long periods of time while the result is cached.
How to resolve the error
Please have your system administrator disable caching of Admin APIs, or at least reduce the cache duration to a significantly shorter time (like 5 or 10 minutes instead of an hour or more). SKULabs throws errors when PUT/POST requests have any caching and when GET requests have more than 3599 seconds of caching.
There are many places that caching could be taking place, including but not limited to the following:
Content Delivery Networks (CDNs) such as Amazon CloudFront, Akamai, or Cloudflare
Server configurations files for Apache, Lighttpd, Nginx, or perhaps
.htaccessfiles in your server root
Reverse proxies such as Nginx, Squid, or Varnish
Caching plugins such as WP-Rocket, W3 Total Cache Minify, Cloudways FPC, Turpentine, Phoenix PageCache, etc.
Your hosting provider may have its own caching, especially in shared hosting environments.
The original error message you get may contain additional details that can help track down where the cache configuration change should be made. However, SKULabs support will be unable to directly assist with this type of issue since it is an e-commerce software configuration issue. Those unfamiliar with administration of servers and who do not have dedicated staff for this type of configuration issue are recommended to sign up for Shopify or BigCommerce.