How to merge two shotwell libraries?

Up to 2020 I had a desktop computer upstairs where I used shotwell for managing my photo’s. In 2020 due to family circumstances I started using our laptop downstairs for my photo’s.
I would like to join the two libraries on this laptop.
What is the best way to join the two libraries?

Has anyone experience with these tools?
https://github.com/AshleyYakeley/shotwell-tools

Thank you
Gerrit

Host: HP630 Kernel: 6.1.1-pclos2 arch: x86_64 bits: 64 
Desktop: MATE v: 1.26.0 Distro: PCLinuxOS 2023
Shotwell 0.30.1

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