Fix Product Management Bugs

My e-commerce site runs, but the moment I touch anything related to product management things break. I am dealing with clear functionality errors: creating a new item, editing an existing one, even basic inventory moves sporadically fail or show wrong data.

I need someone who can step into the codebase, trace the offending logic, and deliver a clean, tested fix so every product-related action behaves exactly as intended without introducing fresh issues elsewhere in the checkout flow.

Deliverables I expect
• Root-cause diagnosis of the product-management malfunction
• Clean, commented code or configuration changes applied in my environment
• A concise report outlining what was wrong, how it was fixed, and how to avoid the same pitfall in future updates

Please be comfortable debugging live e-commerce stacks and working with typical tools such as browser dev tools, server logs, and version control. I am happy to provide repo access and staging credentials right away so we can get this resolved quickly.