Syncing a New Catalog between PCs

[Robert21954984dg37]

I typically open a new catalog for each individual project that I'm working on to keep everything separated.  For the last 8 months or so, I have been doing all of my editing (LrC) solely on my laptop due to travel.  Now that I am home, I want to be able to sync with my desktop PC, which has also been using different catalogs than the original LrC sync catalog. 

How do I change my LrC sync catalog to be the same on both PCs so that I don't keep getting the "you are currently syncing "xxxx.lrcat". Would you like to switch to this one instead?" message?

Is it even possible?

[AxelMatt]

You can't sync different catalogs in Lightroom

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Here you'll find several articles how to use LR on vacations and merge different catalogs.

How do I use Lightroom Classic on my laptop when I go on vacation? | The Lightroom Queen

Merging Catalogs - The Overview | The Lightroom Queen