If you decide to pursue a different kind of apprenticeship, you must leave your current one and reapply.
Can you swap apprenticeships?
Yes, you might start looking for a new place before you leave your present one. Employers may be curious why you did not finish your previous apprenticeship since they are afraid that you will leave your next one. Consider if resigning from your current apprenticeship is the best decision and if the new one will be better.