DK 5.8 migration tool error

[maderios]

Hi
DK 5.8 (git version), Arch Linux system.
I tried migration tool sqlite → mariadb external database
Migration stops here:
'Error while converting the database.
Details: Duplicate entry 'mtvx.jpg' for key 'album''

OK but file 'mtvx.jpg' doesnt exist !

-- 
Maderios