We are having product listing in category as page1, page 2 etc.. Each page having same h1 tag because main url is one with different page no. But SEO tool gives me duplicate h1 tag error for that pages. So how to overcome this issue give me suggestions.

you can't use same h1 tag line in multiple pages that is why plugin shows error.

edit the h1 tag to include part of the product name or page number, using the values from the sql