I did an affinity propagation algorithm and got above 100 clusters, but evaluating with different methods, I get 3 clusters.

I wanted to lower the number of clusters, but with any negative value of preference parameter I get a warning:

Affinity propagation did not converge, this model may return degenerate cluster centers and labels.

I even increased the number of iterations to 2000 and I get a result: did not converge.

What is wrong?