Just giving a bit of context here:
Marianne is a french far-right sovereignist newspaper. I'm not surprised it's spreading this kind of informations as its goal is definitely to weaken Macron's government. Plus a lot of its headlines are clickbaity bullshit serving a far-right agenda.
I'm not saying it's a direct propaganda newspaper, but their interests are inline with those of Russia. It's easy to get an officer to say this or that so I wouldn't trust anything written here as it's just opinions from some french officers.