I want to take master's courses in addition to my bachelor's/preparatory/bridging programme

It is possible to combine 2 programmes. This is allowed within FSW up to a maximum of 72 credits for both programmes combined and only if you are also in the diploma year for your lowest programme.

How do you combine? Check the SisA manual > re-enrolment Manual: Re-enrolment for a new academic year (uantwerpen.be)