AppStream cache update completed, but some metadata was ignored due to errors.

[sunbear-c22]

There are other post on this issue before dated in 2016. However this issue is resurfacing on my system:
Ubuntu 16.04.

$ uname -r
4.10.0-42-generic


$ dpkg -l | grep appstream
ii appstream 0.9.4-1ubuntu3 amd64 Software component index
ii libappstream-glib8:amd64 0.5.13-1ubuntu5 amd64 GNOME library to access AppStream services
ii libappstream3:amd64 0.9.4-1ubuntu3 amd64 Library to access AppStream services



Error:

$ sudo apt-get update
...........
Get:32 http://ppa.launchpad.net/tista/adapta/ubuntu xenial InRelease [17.5 kB]
Fetched 3,106 kB in 7s (440 kB/s)
AppStream cache update completed, but some metadata was ignored due to errors.
Reading package lists... Error!
E: Problem parsing dependency Depends
E: Error occurred while processing lxshortcut (NewVersion2)
E: Problem with MergeList /var/lib/apt/lists/sg.archive.ubuntu.com_ubuntu_dists_xenial-updates_universe_binary-amd64_Packages
E: The package lists or status file could not be parsed or opened.



Previous posting includes:
https://askubuntu.com/q/854168/541417 ---> Answer: https://askubuntu.com/a/859116/541417

I have enabled xenial-backports repository but still get the same error:


$ sudo apt install appstream/xenial-backports
Reading package lists... Error!
E: Problem parsing dependency Depends
E: Error occurred while processing lxshortcut (NewVersion2)
E: Problem with MergeList /var/lib/apt/lists/sg.archive.ubuntu.com_ubuntu_dists_xenial-updates_universe_binary-amd64_Packages
E: The package lists or status file could not be parsed or opened.



How do I fix this issue?