Fix Node API Endpoint Bug

A single POST endpoint in my Node API is failing on specific requests. Other routes behave normally, so I know the server and database layers are healthy—the problem sits squarely inside that endpoint’s logic or its validation chain... (Budget: £20 - £250 GBP, Jobs: API Development, Backend Development, Debugging, JavaScript, Node.js, RESTful, Software Development, Software Engineering, Software Testing, Web Services)