Error message on update of debian jessie on banana pi M64

[Freek de Kruijf <f.de.kruijf@gmail.com>]

I got the following error message on "apt update" on a debian jessie system on 
a Banana Pi M64:

W: Failed to fetch http://security.debian.org/dists/jessie/updates/InRelease  
Unable to find expected entry 'main/binary-arm64/Packages' in Release file 
(Wrong sources.list entry or malformed file)

Indeed main/binary-arm64 is missing there. Others like main/binary-armhf or 
main/binary-armel are available. Should I enter a bug report?

-- 
fr.gr.

Freek de Kruijf