Warehouse entry for repair items of previous sales invoice

ERPNext
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1

I made a sale of electronic equipments with an sales invoice, how i could register an inventory entry for some of that electronic equipments sold for guarantee or hardware revision to fix some issues?

That equipments should be returned to customers after we solve the issue.

2

You can use stock entry with zero rate to make a material receipt and then issue out the material once the repair is completed

3

Perfect, works for me.