Water under Ecam 23.210

Manufacturer: DeLonghi | Type / Model: ECAM 23.120.B - fully automatic coffee machine | approx. year of manufacture: 2014

Hi. I received a new water tank for our Ecam 23.210 last week. Today, a week later, I have a not insignificant amount of water under the machine. This runs over the receptacle of the tank into the drip tray and also directly onto the table.
This was actually the reason for the new water tank, because the problem existed before.
What could be the reason for this or how could I fix it?

Until a few months ago this was not, or in any case not to this extent.

The machine is already 7 years old, but otherwise runs flawlessly. Up to now just under 22000 covers

Is there lime on the valve on the machine where the water tank goes in?

No. Just checked again.
It is again the whole guide from the water tank wet