Sometimes e.g. the item condition value erroneusly gets changed or left blank while trying to start a previously prepared listing, every one of those affected listing has to be manually clicked on and the item condition value selected to allow the listing to be started.
This is very annoying. If GS absolutely has to periodically check updated listing values, please make sure to have the corresponding values set to what they originally were afterwards in order to avoid this completely unnecessary manual interaction. Thanks.