Op 08-02-17 om 12:03 schreef Klaus Jantzen:
I removed the two entries in the directory
Which directory? /var/lib/apt/lists? That won't help. You need to fix the source, i.e. duplicate lines in the sources.list file in /etc/apt/ or - possibly - duplicate files/entries in /etc/apt/sources.list.d/.
Regards, Frank