[BUG] [JAVA/SPRING][3.1.0] Model names are not working when coming from another file.

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

The generated model has a wrong name, when the model comes from another file.
E.g. in my example the model is named AddRequest, but should be named UserDto

openapi-generator version

I am using 7.10.0. It is somewhat of a regression. This issue is not happening when I use openapi: "3.0.3", but it is happening with openapi: "3.1.0"

OpenAPI declaration file content or url

Openapi 3.1.0 Not working

Openapi 3.0.3 Working

Generation Details

git clone git@github.com:aminabromand/openapi.git
and follow the readme

Steps to reproduce

git clone git@github.com:aminabromand/openapi.git
and follow the readme

Clone the repository linked in the issue and follow its README to reproduce the Java/Spring generation with the OpenAPI 3.1.0 and 3.0.3 examples. Compare the generated model names and trace how the external model reference is resolved. Done means the 3.1.0 example generates UserDto rather than AddRequest, without regressing the 3.0.3 behavior.