I didn’t want to start a new topic, so I’ll ask my question here. 
https://www.aromes-et-liquides.fr/en/solana-concentrates/3663-guanabana-concentrate-solana.html
From the above concentrate, I mixed 5ml as a test batch with a 20% mixing ratio using a 70/30 base back in January. Tasting it now, I found that it produces a harsh, choking vapor that feels like it’s tearing my lungs apart.
It smells alcoholic but I can also sense the pineapple alongside it. There shouldn’t be an issue with the base liquid, as I’ve vaped about 11 flavors with the same base without any problems. The aroma’s expiration date is 2026/02. The bottles are always clean and washed/dried properly.
Is it possible for an aroma to be spoiled from the factory? 
Has anyone encountered such a case?
(Of course, I will mix a new batch and I also have another bottle of this aroma, from which I will also make a test mix.)