Max. Number of objects in view clusters

Hi, experts:

I have a view cluster, which I´m entering several tables related among them in.

Point is that when I try to put the table number 16 and activate such view cluster, SAP reports me an error: "Max. number & objects exceeded in view cluster."

Must I understand that I can´t put more than 15 tables in ONE view cluster? I couldn´t believe it...

Thanks in advance, people!