Enum describing possible database errors.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/errors/database_error.proto)

| Enums ||
|---|---|
| ## `CONCURRENT_MODIFICATION` | Multiple requests were attempting to modify the same resource at once. Retry the request. |
| ## `DATA_CONSTRAINT_VIOLATION` | The request conflicted with existing data. This error will usually be replaced with a more specific error if the request is retried. |
| ## `REQUEST_TOO_LARGE` | The data written is too large. Split the request into smaller requests. |
| ## `UNKNOWN` | The received error code is not known in this version. |
| ## `UNSPECIFIED` | Enum unspecified. |