Welcome to the forum.
Here are my thoughts –
– HR Drift Test is a one-hour test (excluding 15-20 min. warm-up). Your run was for 42 minutes
– Your initial HR is around 155 (and not stable). I would recommend targeting a lower initial HR and adjusting your pace to maintain HR at this level.
This article/video has detailed instructions for the HR Drift Test.
Wish you the best!