Hi, thank you for reply.
I know the default setting will let slug change to -2(or -3 etc…), but I already check all of product and I can’t find any same slug in my product.
The strange thing is when I delete a product that slug was abc-2 to recycle bin and turn it back on product list and change it slug to abc, it was became to abc-2-2.
I’m very confuse that and I can’t change back to abc even abc-2 with slug.
So I hope somebody can help me to fixed it.