Inventory/Stock Quanity

Inventory > Stock Qty – It states: Stock quantity. If this is a variable product this value will be used to
control stock for all variations, unless you define stock at variation level.

I have set this Qty to 300. I’ve left all the quanities at the variation level at 0.

When you go in to purchase the item, it’s showing as out of stock.
Please help.
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