Sell to whom? Do Euro bonds work differently than in the US?
You can sell bonds in the US and it’s only slightly different from selling a stock. The bond changes hands, but the government debt and interest payments remain static. (The buyer and seller get to deal with premium/discounts and accrued interest, but that has zero effect on the underlying debt from the issuing government)
I don’t understand why this would be a bad thing for them to sell.