You have two treasure chests filled with exactly identical toys. One chest is called “test”, the other is called “production”. Both chests are extremely identical in every way and contain the same toys. You, as the parent, have full access to both chests, but your child only has access to production.
The “test” chest is where you can put new toys to see if it’s suitable for your child to play with, or that the new toys won’t destroy any of the existing toys. If nothing breaks and all the new toys play nicely together, you then put an exact copy of the new toy into the “production” chest.
Pretend that one day, you decide to throw out the production cheat (i.e. “delete the production database”) and now your child has no toys to play with and they are extremely upset.
USUALLY you have a “backup production” toy chest hidden in your closet that you can take out incase you ever throw out the production chest, it just takes some time to setup so your child can play again.
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