I already fix my error,with the chat support.
All of this is because oberllo. If it is your fullfilment center,you need to disable oberlo option (at the ed of the shipping page)
I guess it could be the same if you have another fullfilment center,for sure.
Try and tell me if you solve this one.
Here's the solution for this issue.
It's all about inventary. Youj ust need to select the right inventary for your product. For example if it's oberlo you need to select oberlo in inventary instead of Shopify For more details check the images.
In your product edition:
Hope it helped to solve the issue for you.
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