Non solicit clause

Worked at a company that sells medical devices for over a decade. Last year I left to work for an upstart rival company. A lot of the clients followed me to the new company. Turns out the new place had a few red flags and I ended up rejoining my old company this year.

I have a non solicit in my contract (industry standard) with the company I just left but wondering from a legal standpoint how that would hold up as most the clients were ones that found me through the radio/advertising/word of mouth.

As those clients are in the database of my current company would I be able to reach out to them to indicate I have gone back to my original employer.