What are the potential pitfalls of not understanding the code in an online shop project when making changes?

Potential pitfalls of not understanding the code in an online shop project when making changes include introducing bugs, breaking functionality, and compromising security. To avoid these issues, it is crucial to thoroughly review the existing codebase, document any changes made, and test thoroughly before deploying the changes.

// Example of a code snippet that implements the fix by thoroughly reviewing the existing codebase before making changes

// Before making any changes, review the existing codebase to understand the structure and dependencies
// Document any changes made in comments or a separate document
// Test the changes thoroughly in a development environment before deploying to production