Joined a college part time while EE is pending

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I got my e - apr on June 14th 2018

I have completed my 1st Masters in US in May 2015.

I have started my 2nd Masters in August 2018. I may or may not complete this degree. Should I update CIC? If so within what time frame?

You don’t need to update them on anything after submitting e-APR unless it affects your application/CRS score. E.g.: address change, marriage, birth of child, criminal convictions etc. I don’t think your work/academic pursuits after e-APR count.

Update:

My lawyer has given me similar advice. Thanks!