For me, a booster shot is required as my initial 2 doses were completed in Early March 2021…which would be more than 365 from days when I will enter Spain in late April. So I am correct..it is not wrong! Whether one needs a booster depends upon when you received your second shot as I understand it. I am somewhat immune compromised, which is the reason I recently obtained a fourth jab.
For Clarification From Spanish Travel health.
As of 1 February 2022, vaccination certificates issued by the competent authorities of the country of origin shall be accepted as valid
14 days after the date of administration of the last dose of the complete vaccination schedule (primary vaccination), provided that
no more than 270 days have elapsed since the date of administration of the last dose of said vaccination schedule. Thereafter, the vaccination certificate issued by the competent
authority of the country of origin must reflect the administration of a
booster dose. These certificates will be considered
valid from the day the booster dose is administered. Complete vaccination schedules are defined as those established in the
COVID-19 vaccination Strategy in Spain.