A bug has appeared in the latest "new version of Add a Product interface" screen.
The "Contribution SKU" field now accepts an existing SKU. Previously it flagged this as invalid.
It then overrides your existing listing with the new details, including the product details. However it retains the old Date created.
I reported a similar bug a few years ago to the SS. After about 10 messages and several weeks/months they fixed it.
They wanted a screenshot of the message ( the one it wasnt displaying)!! - typical SS.