mpMRI and repeat biopsy

Hi there. Been monitoring my PSA for over a year now, currently at 3.97 aged 47 (3.65 a year ago). Clear initial mri and then had biopsy back in September, which revealed 1 suspicious but not diagnostic sample, and was recommended to repeat the biopsy within 6 months , as it was 60% likely to reveal low grade cancer according to consultant. (report mentioned atypical cells) Had mpMRI last week which has come back as pirad2, with 'no focal abnormality to consider for targeted biopsy' and findings  'estimated prostate right 22mL with PSA density 0.18%.' From what i've read pirads2 doesnt require any immediate action, but this goes against what the consultant was advising.  Just a little confused about the next move! Thank you, Stuart