See https://aamc-orange.global.ssl.fastly.net/production/media/filer_public/c1/75/c17583f0-449d-4b36-a9fc-71c82907105e/aamc-2021-amcas-applicant_guide_jw_updated_2.pdf page 33 which describes repeated courses (including repeating AP credit). Note that college courses taken while in high school must be included in the medical school application, and repeating them counts as a repeat on the medical school application.