Error Message on VLT

[SMF]

After unloading a compact flash card into the VLT to an album certain frames are listed with a red color. Upon attempting to export the album the following error message is displayed:

Unable to Save:
Some of the files have assigned the same file name. The file names are marked with red color within the thumbnails.

What does this mean, how were the duplicate names formed as the file in the CF card weren't duplicated. Note that it occurs with File rename or with no file rename on the unload process. How do I correct this?

[LSI_Ketelhohn]

Dear SMF

is it possible files from a previous import were present?

kind regards
Arne Ketelhohn

[SMF]

The import/unload was done into a new album. Both the new and the old names were unique.