Hi
You can set the product to not track inventory or if you activate tracking you can also select Continue selling when out of stock.
https://help.shopify.com/en/manual/products/inventory/track_inventory
Regards
Tom
Bundleup - bundle your products and unbundle your orders.
Channelup is a product data management solution helping Shopify stores automate their processes.
If you require custom development or would like to test out our features contact me at
tom@channelup.io
