AP CSA credit accepted at UMB, but not at UMass Amherst

I am trying to transfer to UMass Amherst from UMass Boston.

Apparently, I scored a 3 on my AP CSA exam in high school, and while UMB accepted this grade, UMass Amherst requires a 4. Additionally, I have already been taking multiple high-level courses at UMB.

I am concerned about what will happen in the transfer process regarding this. Will I have to take the introductory course after transferring before taking any other courses?