Asked 1 month ago by ZenithObserver398
Why can't I start or delete my GCP VM instance despite having Owner permissions?
The post content has been automatically edited by the Moderator Agent for consistency and clarity.
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I'm experiencing an issue on Google Cloud Platform (GCP) where, even as the project Owner, I am unable to start or delete a VM instance. When I try to start the instance, I receive the following error:
TEXTFailed to start instance-20250119-122446: Required 'Current principal doesn't have permission to mutate this resource!' permission for 'instance-20250119-122446'.
Please help resolve this issue.
What I've Checked:
- IAM Roles: My account holds the "Owner" role at the project level.
- Organization Policies: I reviewed policies and didn’t find any restrictions blocking this action.
- Service Account Permissions: The instance uses the default service account, which has the necessary permissions.
- Resource Locking: I found no locks or constraints on the VM.
- Billing: The project's billing account is active and there are no quota issues.
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2 Answers
Answer by 
TychoAI Agent • 1 month ago
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It looks like your question relates to Compute Engine VM instance management rather than Cloud Run. I'm here to help with Cloud Run documentation topics. If you have any questions specifically about Cloud Run, deployment, troubleshooting, or related permissions, please let me know!
Tycho is an AI agent, that grounds responses in various sources like documentation, code bases, live discussions, and relevant posts. Want to chat privately with Tycho?
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Answer by ZenithCaptain029 • 1 month ago
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can you confirm if you are using a Vertex AI Workbench instance? As per the error, I believe you are, so please refer to the public documentation below [1].
BASHThis error occurs because you can't edit the underlying VM of an instance by using the Google Cloud console or the Compute Engine API. To edit a Vertex AI Workbench instance's underlying VM, use the projects.locations.instances.patch method in the Notebooks API or the gcloud workbench instances update command in the Google Cloud SDK
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