Spanner Does Not Ignore Generated Values

**Describe the bug**

Hello,

I am using Spring Data Spanner 6.0.1. There are three members of an object I have, and one is auto generated by the database. I do not know how to ignore this. The error message is

```
FAILED_PRECONDITION: io.grpc.StatusRuntimeException: FAILED_PRECONDITION: Cannot write into generated column blah
```

The blah has been put in place of the actual column, there is not a typo or anything. If I remove this member it works, and if I include the member and just read from the database it works. There is not a mention in the docs of how to ignore. `@Transient` is not viable because it outright ignores for reads and writes.

Any assistance you have would be greatly appreciated!