Set values to cq:tags- multivalued via Groovy

Hi Guys.

Need help with groovy scripts. 

I have a property String[] which has tags stored in it. I want to move the tags to cq:tags property specifically.

1.  I am able to create the cq:tags property but the data is not getting stored in cq:tags property
2. I tried creating another property name other than cq:tags called "xyz" , and then I was able to store the values.

is property cq:tags protected? how would I store tags to cq:tags via Groovy script?

Have also tried - https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/how-can-i-update-multi-valued-property-using-groovy/td-p/566330

but does not work for cq:tags property. We also tried few other ways including Valuemap and Node objects.