About erroneous vaccination for those under the age of 18 in the COVID-19 vaccine booster shot (third time)

For citizens under the age of 18 who are not eligible for the COVID-19 vaccine booster shot (third time), it was discovered that booster shot was mistakenly conducted on March 11, 2022 at the group vaccination venue in Yokohama (Hodogaya venue). In addition, the health condition and physical condition of the recipient are stable.