I really don't understand what you are looking for. Plenty of landlords have paid off their mortgage early or at the end of the term and now just own the property. It's not that relevant to you.
Do you have the money to pay the mortgage? If so do you have a better way to spend it or invest it? Would it be in your PPR or your pension or anything else? If not, if you pay your mortgage, you increase your profit by about €1500 as you don't pay interest on your loan (even if it's tax deductible, interest is still a cost as you save €1500 in tax because you paid €3000 in interest) and your monthly cashflow. With an increased cashflow, you might have the ability to invest in something else or you might decide to increase your lifestyle. That's really up to you and your priorities.