Stock Minus

Till today, stock minus still happened.

Can you explain with screenshots because this is not clear. If you mean stock reduction is not happening, see what status your orders have and ensure they have ‘order notes’ stating stock was reduced!

no, from the first time I installed woocommerce, backorder is disabled.
but backorder still running until my stock negative

example : https://prntscr.com/axwguc
email : https://prntscr.com/axwhn9

how to resolve it?

It’s not broken my side. I cannot order once it hits 0.

you can see in my first picture, my stock is -3

so, my customer still can order although my stock hits 0.

how to resolve it?

Without being able to replicate the issue my side I don’t know…

WC > Settings > Products > Inventory. What are your settings there

here my setting >> https://prntscr.com/aze303

any problem?

No that looks ok.

I’m not sure what else to suggest. On my test installs, stock won’t go below 0 because the cart page validates them.