There is warning message after I export a package, then I checked the log file and found below words:
To: [Identity].56A96DA9E981481688563E2D14D5D878
Reason: The item contains a reference to an item ...
Hi Jillian,
In export options, I didn't check "Export Referenced Items".
For "References to Unknown Packages" I choose "Remove with Warning", and "Level" is "1".
Thanks for your reply.