# Troubleshooting

## Terraform Plan Fails Because Of Authentication

Check:

- correct OCIDs
- correct region
- API key fingerprint
- private key path
- IAM permissions to create resources

## Autonomous Database Does Not Accept The Configured Version

Remove or adjust `adb_db_version` in `terraform.tfvars`. Database version availability depends on region, tenancy, and service limits. For a real Oracle Deep Data Security lab, use a version compatible with Oracle AI Database 26ai.

## Database Is Not Reachable

Check:

- the client is inside the VCN or connected through VPN, FastConnect, or bastion
- NSG allows port `1522`
- wallet and mTLS are configured
- private endpoint DNS resolves correctly

## Scenario SQL Fails

Check:

- database version is compatible with Oracle Deep Data Security
- executor has privileges to create schema objects, end users, data roles, and data grants
- SQL files were executed in the correct order
- previous scenario state was reset

## Reset Does Not Remove Everything

Run the scenario `sql/99_reset.sql` and manually validate remaining objects. In shared environments, confirm before dropping schemas.