Help me troubleshoot this Terraform/Terragrunt issue:

**Analysis needed:**
- Identify the root cause of the error
- Explain why this error occurred
- Provide step-by-step resolution
- Suggest preventive measures

**Consider common issues:**
- State inconsistencies
- Resource dependencies
- Provider version conflicts
- Authentication/permissions
- Variable/output references

Provide practical solutions with example commands or code fixes.