Magento 1.9.3.6 Error: amount "is not greater than -1

[AngelMatFortun]

I have a simple product in Magento, it is enabled, it has inventory (the quantity has been modified several times) and it is In Stock but when the purchase is finished it generates the following error: amount "is not greater than -1.

It only happens with this product, it was already deleted and recreated and the same error continues to happen. There is no minimum purchase enabled.

Screenshot -> https://snag.gy/shH9eA.jpg

[gelanivishal]

Hello @AngelMatFortun,

Please login admin side and follow below steps

1. Go to system > Configuration
2. Now click on Sales tab
3. Open Minimum Order Amount and set No in Enable field, Please check attached screenshot https://www.screencast.com/t/TqW0DnI2

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