I've also been having this issue, and I think it also corresponded with either upgrading Cura to 4.10, or upgrading the firmware on my s3 to the latest version (I did both around the same time, so it's hard to pinpoint exactly when this message started popping up).
It doesn't prevent me from printing the files (I just have to tell the printer to Ignore) but it is a little annoying when I'm trying to print remotely, since I have to be where the printer is to start the print due to this issue.