I have a retirement visa which expires May of 2022. I returned to the US three months ago in order to get vaccinated and see family. I am trying to return to Thailand and I am in the process of purchasing the required Covid-19 travel insurance in order the satisfy the Certificate of Entry requirements. The insurance application is asking me how long I would like the travel insurance for (0-3 months; 3-6 months, etc.). Of course, the price is more expensive the longer the duration. I purchased Covid-19 insurance in Thailand before I left for America so I am already insured in Thailand. Must the duration of the travel insurance match my retirement visa? Or can I just choose the shortest duration because I'm already insured in Thailand? Thank you!