When a script runs on the wrong record type, it can create errors, update the wrong data, or make troubleshooting harder. Even when a script is deployed carefully, it is a good practice to add checks in the script logic to confirm that it is running in the expected context. 

This helps make SuiteScript behavior safer and easier to support. 

Scenario 

An admin or developer creates a script for one record type. 

Examples: 

• Customer 
• Vendor 
• Sales Order 
• Purchase Order 
• Custom Record 

The script is intended to run only for that record type, but due to deployment changes, testing, or reuse of script logic, it may run somewhere unexpected.