File name form element either should be locked or have description text changed

When I upload an image at file/add, I get taken to a form where I can enter details about the image file.

The first field is prefilled with the filename of the file I just uploaded. Its description text says:

> Name of the file with no path components.

This is confusing. If it's the filename, then I should not be able to edit this.
But I *am* able to edit it, and if I make a change here and save it, everything appears fine. The file_managed table shows the change I made in the filename column. Is this normal? If Drupal core expects this column to be the actual filename, then could allowing the user to change it cause problems?