You tried to tag a commit with git tag v1.1 abc789 but got an error saying "fatal: Not a valid object name abc789". What is the likely cause?

medium📝 Troubleshoot Q14 of 15

Git - Tagging

You tried to tag a commit with git tag v1.1 abc789 but got an error saying "fatal: Not a valid object name abc789". What is the likely cause?

AThe tag name v1.1 is already used

BYou forgot to push the tag to the remote

CYou need to add -m message to the tag command

DThe commit hash abc789 does not exist in the repository

Step-by-Step Solution

Solution:

Step 1: Analyze the error message
"Not a valid object name" means Git cannot find the commit hash specified.
Step 2: Check other options
Not pushing tags or tag name conflicts cause different errors. -m is optional for annotated tags.
Final Answer:
The commit hash abc789 does not exist in the repository -> Option D
Quick Check:
Invalid commit hash = error [OK]

Quick Trick: Check commit hash exists before tagging [OK]

Common Mistakes:

Master "Tagging" in Git

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