I'd rely on the website. But, call DJI support again and have the representative check it again. It's possible that the agent mistyped the serial number.
Agreed. However I just got bitten by that "error on a significant issue" that just happens to be the ONLY reason I purchased the Mini 5 Pro Combo with regular batteries, and also bought a fourth regular battery, that are now of little or no...
They have a pretty darn good history of being accurate. That's the first example of an error on a significant issue that I've heard of. That one example is no reason not to rely on the manuals.