Great article!
Why is it that Negative Adjustments can affect inventory that is dated after the date of the negative adjustment? 
Example;
- As at 31/12/2024, I had quantity 10 of Item A. 
- During 2025, I bought another 10 of the item, increasing my inventory to 20. 
- Today, i.e. in 2025, I post a negative adjustment dated 31/12/2024. The Negative adjustment was posted with quantity 15
 
This was posted without any issues eventhough technically in 2024, I had only quantity 10 in stock. 
How come the negative adjustment dated 2024 can affect and reduce stock that was technically bought after i.e. in 2025? 
 
I have tried this even with the Prevent Negative Inventory flag switched on in the Inventory Setup but it doesn't seem to create any restrictions. This causes further issues because then, the cost of the negative adjustment dated 2024, gets adjusted using the cost of the stock bought in 2025.
 
Any further insight is appreciated!