Cannibalization between to indirect site - how to fix or approach this issue

Hi

I am currently providing SEO for a beauty parlor, where a keyword "lvl" is cannibalized between the main website i.e. beautyparlor.com/lvl and also on wwww.proshop.beautyparlor.com/lvl (proshop is a shopify website). The keyword is necessary in both URL/site, how would I go about to resolve this issue?

I have tried combining the URL slug and updating the text/content for more natural flow, but still receive cannibalization error.