libopenshot is an AUR package, so remove it first:
sudo pacman -Rns libopenshot
You should then be able to do your update.
If you still need libopenshot, you can install it from the AUR after the update:
pamac build libopenshot
Also, note that the linux-meta packages are intended to ensure that you do not continue running an unsupported end-of-life (EOL) kernel that has been removed from the repos. linux616 is no longer in the repos, so linux-meta will automatically remove it from your system and install linux617.
Manjaro has no control over the AUR, and even though we offer access to the AUR, the use of the AUR is not officially supported.
Furthermore, for optimum success with the AUR, you should be running Manjaro Unstable, given that anything in the AUR is intended for use with Arch Stable, which is on par with Manjaro Unstable.
I realise you’ve been a forum member for well over a year now. Nonetheless, it might be beneficial to do some reading; perform some research; in order to discover how things actually work with a so called “rolling release” distribution such as Manjaro.
The two links directly above will help in terms of the AUR.
AUR is unsupported - yes, it is available and yes, Pamac can build custom packages - even so - it is unsupported, such maintenance is a task for the system administrator.