Replica Configuration Not Saving


I am trying to setup replicas to sort products by price. Weirdly, I update the configuration (added a sort-by attribute) and it confirms it is saved, but when I return it is no longer there. It is back to the default configuration.

Am I missing something obvious? Why is it not saving?

Anyone come across this issue?

Appreciate any help.

Derp. Solved it. It was something obvious…

One of my attributes (the one I was adding for sort) had a comma in the title. Updated it and it is now working.