Let it ride, there is no difference in real life.
I’ve used slick 50 in lots of high powered bikes and never had any clutch problems.
The JASO spec is just an excuse to triple the price.
The fact that oil has not been certified to JASO specs does not mean that it does not meet them.
I know one British oil company ( Morris ) put exactly the same oil in both v twin race oil tubs and extended life fleet car oil tubs.
I was told this by an employee so I checked it out with health and safety declarations for both products, identical ash analysis!
NO, NO, NO!! Using oil that is NOT labelled JASO MA or MA2 will damage your clutch. Why? Regular automotive engine oils contain friction modifiers to make it "slipperier". This will cause your clutch to begin slipping and eventually you will need to replace the clutch disks.
No, this is not an excuse to triple the price and MA or MA2 oil isn't priced significantly higher (in my experience at least) than automotive oils of the same quality.
There is a Mobil 1 MA/MA2 rated oil:
https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/products/mobil-1-racing-4t-10w-40But don't take my word for it. Read your Owners Manual and you will see MA or MA2 specified. Also look at the oil weight vs. temperature chart. For most of us living below the Arctic Circle, the best choice is 20W-50 as that covers the usual operating environmental temperatures.
My personal preference is the Castrol Actevo Motorcycle oil:
https://www.castrol.com/en_us/united-states/home/motorcycle-oil-and-fluids/motorcycle-engine-oils/motorcycle-oil-brands/castrol-actevo.html?gclid=CjwKCAjwoduRBhA4EiwACL5RPy0kY5hlGLPeejNOv9sSlfCT72hjX6y46jd-AQZw_yATgM7GiUUZpBoCqZQQAvD_BwEMany here also like the Shell Rotella T6 Diesel Oil which is also rated for motorcycles.
In answer to your question: Yes, drain that regular oil out and replace with MA or MA2 spec oil before you damage your clutch.