Update POST.md

docs/en/Community-Articles/2021-05-24-Removing-EfCore-Migrations/POST.md

@@ -26,6 +26,8 @@ We've [documented the structure](https://docs.abp.io/en/abp/latest/Entity-Framew
 
 If you want to make it in your solution with today, follow the steps in this article.
 
+## Warnings
+
 > There is one **drawback** with the new design (everything in software development is a trade-off). We need to remove the `AppUser` entity, because EF Core can't map two classes to single table without an inheritance relation. I will cover this later in this article and provide suggestions to deal with it.
 
 > If you are using **ABP Commercial**, ABP Suite code generation won't work correctly with the new design. In this case, we suggest to wait for the next version.
@@ -451,4 +453,4 @@ With this article, I wanted to show you how to remove the `EntityFrameworkCore.D
 
 ### Source Code
 
-You can find source of the example solution used in this article [here](https://github.com/abpframework/abp-samples/tree/master/UnifiedEfCoreMigrations).
+You can find source of the example solution used in this article [here](https://github.com/abpframework/abp-samples/tree/master/UnifiedEfCoreMigrations).