Hello,
Thank you very much for your feedback.
Here are the steps taken:
1, 2, 5, 6, 7, 8,
9 in progress, I'm waiting to see over 24H if the problem appears.
For the 11 I'm not too ready to migrate but if it's really necessary why not. But I'd rather opt for a solution with my version.
I'll keep you informed of the result.