How do I fix this? :(

Can you go to Tools > Manage Notetypes and see if “AnKingOverhaul (AnKing / AnKingMed)” note type has any notes? If it doesn’t, can you try deleting it and syncing again?

it appears the AnKingOverhaul note type in your collection has different fields and structure from the expected form: It has the “Front” and “Back” fields.