Under the Setup -> SuiteCommerce Advanced -> Setup Website, then
edit the website you're working on, there's a FIELD SETS tab. If you have a look under the DETAILS fieldset, you should be able to verify or add the storedetaildescription field.
Once you have it in there, you need to go to the Setup -> SuiteCommerce Advanced -> Configuration screen, and on the Shopping Catalog then go to the Product Details Information subtab and make sure you have the storedetaildescription field in there. There's more details on that config screen here:
https://developers.suitecommerce.com/bridgehead4667037522