M2P & SC firmware match -error?

[Citizen Flier]

The last time I flew there was a prompt indicating some form of firmware incompatibility, or some mismatch. An option that I don't now recall popped up, and I agreed. Flight went perfectly. Now at home I confirmed that the SC Firmware is up to date, and there are no warnings when I start the M2P. And I do have the current DJI assistant 2. I don't like finding there's a firmware or other mismatch when I'm out in the field with no internet access.

What is the best procedure to confirm that all firmware/apps etc are current & consistent? Any idea of what the mismatch warning might have been? I just don't recall what the issue was as indicated by the prompt. Thanks.