Hi Ainey
On the basis of the above figures, I think it's pretty clear cut that you would be better advised to sell the rental property and apply the net proceeds against the outstanding balance of the mortgage on your PPR. This would be a better use of your capital and the fact that it would also simplify your life and improve your cash flow is an added bonus.
You are currently paying a rate of 4.95% on your PPR mortgage. Let's say you reasonably expect that rate to drop to, say, 3.5% when your fixed rate term finishes next July. Paying down your PPR mortgage ahead of schedule is the equivalent of receiving a risk free, tax free return of 3.5%. That's the return your rental property has to beat. If it doesn't, then your capital would be better employed by paying down your PPR mortgage.
Your achievable gross yield on your rental property is around 5.5% (880 x 12/€190k) or a net yield of around 3.9% (70% of 5.5). Netting off the rate at which you are financing the purchase of your rental property (1.75%) leaves you at 2.15%. This is obviously a lot lower than 3.5% (the anticipated interest rate on your PPR mortgage) and that's before you take tax on your rental profits into account.
When you do take tax into account, the relative advatage of paying down your PPR mortgage becomes even clearer.
You may also be able to secure a lower rate on your PPR mortgage by having a lower LTV which would be an additional benefit.
I should point out that I am ignoring possible capital gains for the purposes of this analysis. In the medium term property prices could either rise or fall so should be ignored, in my opinion, in deciding whether to acquire or retain any rental property.
Hope that helps.