(I'm a Korean developer. I am sorry that English may be immature.
After creating the entity as shown in the attached picture below,
We create a function to query through Java Source Code.
An error has occurred that will return the data that still exists as null.
When I debugged it to find out why, I found a bug that replaced parameter binding with a wrong value in the process of running the query.
I'm sorry if this is because of my inexperience.