Charmhub upload review failed for charm

Hi,

Using Launchpad to build charms, the charmcraft.yaml specifies a set of series but no architecture tied. On building, one failed to upload to charmhub as follows:

| Subject: Charmhub upload review failed for ubuntu-repository-cache
|
| Launchpad uploaded this charm to Charmhub, but Charmhub failed to review it:
|
| Cannot insert package 'charm' with id '6uBDVyJNZl8zfGfsreE2wsAnso5Q9Xhr' and revision 153, this combination already exists in the database.
|
| --
| https://launchpad.net/~ubuntu-repository-cache-charmers/ubuntu-repository-cache/+charm/ubuntu-repository-cache/+build/4860
| You are the requester of the build.

I tried requesting re-upload but it kept failing with the same error.