What should I answer regarding my past Thai visa application experience?

“Have you ever applied for Thai visa” - hey guys I’m on the travel page of the application and ran into this question.

I was last in Thailand 18 years ago, I think, and I don’t remember the visa situation fully.

I think I had 90 days at the time? Could be wrong, maybe 60 - but I stayed 6 weeks.

I booked the whole trip in a Trailfinders office in Dublin - or something similar to Trailfinders - where you would also book “Interrailing” tickets etc.

Point is, I can’t remember if they applied for a visa for me, or if there was visa free travel back then maybe?

What would you suggest I answer?

Thanks for any input 🙏