My 18 year old son received a 1099-INT after I already filed my return and claimed his interest on my tax return

Hello, 

My son turned 18 in August of 2024 and is a Senior in high school. He received a 1099-INT for the interest on his savings account but my husband and I already filed our return and claimed his interest on our taxes using schedule B. Do I need to amend and file a 8814? Or do I amend and remove his interest completely and have him file his own? I’m so confused. I don’t want him to be in trouble for not filing if he has to. His interest earnings was $1498 and he had no other income. He is a full time student.