[BUG][JAVA] Feign : Reference to RetryableException is ambiguous

[jijins1]

Bug Report Checklist

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

I'm trying generate a feign client with Authentification. The code is well generated but not compile with an error "reference to RetryableException is ambiguous"

openapi-generator version

7.3.0

OpenAPI declaration file content or url

Generation Details

Feign Version : 7.3.1

Steps to reproduce

Generate a client with oauth authentification. Use Feign 7.3.1

Related issues/PRs

Suggest a fix

I think the ambiguity is added from this commit https://github.com/OpenFeign/feign/commit/be25759e93d2b94408b44270013d8379ec9b47bd I think adding a cast of the null value in date (For compatibiliy with older feign version) should be valid I will propose a pr