Rules' condition "is not" doesn't work

[darya_darya]

I've get three rules included the same main products. The first rule add a free product (amasty extention) and other two add poducts with fixed discount (sku 505143, 505144). I need: if a customer buy one product with discount (for ex. 505143) other product with discount (5050144) loose that discount. But condition 'sku is not 505144' (or 505143) doesn't work. The both products have discount. What kind of mistake did I make?

[R_Doshi]

Hi @darya_darya 

There is one setting called "Discard Subsequent rules", which, I can see, is disabled in your screenshot.

Please enable it and set the priority (The highest priority is number 1) for each of this condition in relation to others, which helps the Magento in executing the condition according to the set priority. 

Hope it helps!