Unable to intially save an entity with a non-null custom @Id identifier.

[jackdpeterson]

Given an entity with a structure roughly as follows:

@AllArgsConstructor
@NoArgsConstructor
@Data
final class SomeItem {
    @Id
    private String id;

    private string someOtherField;
}        

SomeItem si = new SomeItem('myCustomId','anotherField');
this.repository.save(si).block();

It doesn't appear that there is way to save an entity if the ID is pre-computed in Java land.

The exception looks like:
java.lang.IllegalStateException: Failed to execute ApplicationRunner at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:778) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:765) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:322) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at com.example.MyApplication.main(MyApplication.java:27) ~[classes/:na] Caused by: org.springframework.dao.TransientDataAccessResourceException: Failed to update table [example]. Row with Id [myCustomId] does not exist.

The backing Driver I'm working with is

     <!-- R2DBC MySQL driver -->
        <dependency>
            <groupId>dev.miku</groupId>
            <artifactId>r2dbc-mysql</artifactId>
            <version>0.8.0.RELEASE</version>
        </dependency>

[mp911de]

That's a duplicate of #253 and #275.