I had an non immigrant ED visa in January 2023, which mentions the day the stamp was added and two smaller rectangular stamps, one underneath, and one on the next page mentioning the day I received it and the expiration date (3 months later). There is also a red stamp saying USED above the visa.
I left Thailand 3 weeks after receiving it and returned 8 more times since on visa exemptions. Now I want to apply for another ED visa, but I was told that I have to first cancel the ED visa that I received almost 3 years ago. Is this correct?