ghostwriter wants credit

I publish illustrative scenarios prepared by my practice. All participants and conversations are fictional. The fictional posts are not posts by real users, accounts of client experiences, or reports of actual results.
Illustrative scenario prepared by my practice.
For informational purposes only. This is not legal advice. Laws vary by jurisdiction. Consult a qualified attorney for advice specific to your situation.
Hypothetical question

Looking for advice on a legal issue. Here's what happened.

ghostwriter wants credit. I've been dealing with this for about 6 months now and the situation isn't improving.

The contract was signed 23 months ago. I have a copy of the original agreement. The total amount in dispute is approximately $41,000.

Am I overthinking this or is this a real legal issue worth pursuing?