Since the published circulars are definitive, better estimates do not create another version of TAI; it is instead considered to be creating a better realisation of Terrestrial Time (TT).
sˈɪns ðə pˈʌblɪʃt sˈɜːkjʊlɚz ɑːɹ dᵻfˈɪnɪtˌɪv, bˈɛɾɚɹ ˈɛstᵻməts duːnˌɑːt kɹiːˈeɪt ɐnˈʌðɚ vˈɜːʒən ʌv tˌiːˌeɪˈaɪ; ɪɾ ɪz ɪnstˈɛd kənsˈɪdɚd təbi kɹiːˈeɪɾɪŋ ɐ bˈɛɾɚ ɹˌiːələzˈeɪʃən ʌv tɚɹˈɛstɹɪəl tˈaɪm tˌiːtˈiː.