Error facing in variations field during create listing how to fix this error i want to listing my products early

One or more provided value are invalid when i create a variation of my product listing.

My product is bangles and I am unable to add size and colour variation in a single listing. Talked seller support twice but they say in your category (Jewellery>Bangles and Bracelet) you can not add these two (size and colour) variations but other sellers on Amazon are adding size and colour in a single listing. I also tried Bulk listing there also don't show any option for that. Please give me a solution to this problem it's a big threat to my business which Amazon team unable to solved.