Unable to move assets that have a red flag icon

We are unable to move assets that have a red flag icon marked on them.

Example:

The asset's DRM expiration date is past.

AEM purposely blocks expired assets from being modified.  An asset is considered expired once the current date and time is later than the date set in the metadata property "prism:expirationDate".

See this documentation for more info on AEM Assets DRM.