Error message relating to sku

Help?

I have managed to create a listing, however Amazon now is coming up with error messages relating to the SKU.

I have inputted my own SKU (STR005) and also tried leaving it blank and Amazon have created there own (K1-Y9Y5-A49J and 6T-JSL7-GPY2) and i am still receiving the same error message.

Can someone please help and explain what i am doing wrong?

It also states there is further information required, however its all filled in correctly, i have checked this a number of times.

Error message:

• SKU does not match any ASIN and the product data provided is not eligible for ASIN creation.
• There is no record of the SKU corresponding to this update on your account. This commonly occurs when there are other issues on your SKU.
• Listing requires additional information. Click “Edit draft” to continue.