There are situations where multiple personas might make sense. If you are just getting started, I'd focus on your primary persona and get that right. Does your product solve problems that multiple personas have? If so, you could extend your messaging to that persona. But don't assume the same message for your primary persona will land with your secondary persona. Do the persona research or risk throwing away marketing dollars.
I had a product several years ago and the primary persona was the sysadmin. We built some functionalty to deeply montior SQL server and decided to also sell this product to DBAs. In the initial launch, we used the same message for both personas. FAIL. Lesson learned - do the persona and messaging work.