Why isn't my Update operation saving changes in ASP.NET Core CRUD?

I'm working on a CRUD application in ASP.NET Core with Entity Framework, and I’m having trouble with the Update operation.

When I attempt to edit an existing Teacher record in my database, the values do not update. I have verified that the form is submitting the correct data and the teacher ID is passed correctly, but the changes aren't being saved.

Problem: The Update operation doesn’t seem to save the changes to the database.

I’ve double-checked the model binding and the form submission.

I’m ensuring that the correct ID is being passed to the update action.

What could be causing the Update operation to not save changes in ASP.NET Core?