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A deployment command failed with 'Stage already exists' error. What is the likely cause?

medium📝 Debug Q7 of 15
AWS - API Gateway
A deployment command failed with 'Stage already exists' error. What is the likely cause?
AMissing deployment description
BUsing an invalid REST API ID
CAPI Gateway service outage
DTrying to create a new stage with a name that already exists
Step-by-Step Solution
Solution:
  1. Step 1: Analyze error message

    'Stage already exists' means the command tried to create a stage with a duplicate name.
  2. Step 2: Understand cause

    Creating a stage with an existing name causes this error; deployments to existing stages do not.
  3. Final Answer:

    Trying to create a new stage with a name that already exists -> Option D
  4. Quick Check:

    Duplicate stage creation causes error [OK]
Quick Trick: Use create-deployment to update existing stage, not create-stage [OK]
Common Mistakes:
  • Confusing create-stage with create-deployment
  • Ignoring duplicate stage names
  • Blaming unrelated errors

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