Why You Should Always Build in Sandbox First

I broke something in production today. Not massively—but enough to cause panic.

I was updating a validation rule and forgot that it would block updates from a flow. The rule fired, the flow failed, and users were stuck. Classic rookie mistake.

So… yeah. From now on, I’m using sandbox for anything that might break stuff.

Sandbox lets you:

  • Test changes in isolation

  • Use realistic test data without messing up real records

  • Sleep better at night

If I could go back in time and give myself one piece of advice: never test in prod. Lesson learned.