Bulk Upload Item Weight

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Hello There,
If let say we have around 5000SKu in our inventory that needed to update the weight for each item, is there any way to bulk update the weight of the item?
currently, i saw this posting: https://community.shopify.com/c/Shopify-Discussion/How-to-bulk-update-import-weights/td-p/459375
but the solution is if my product around 100 to 200,
I also have to try update weight using excel, but even the result no error, my item weight still not changing.
can someone help showing the flow how to update weight properly