Deeply, in order to confirm the issue is related to @Embeddable, I added the following into persistence.xml to disable weaving,
<property name="eclipselink.weaving" value="false"/>
Then, while deploying, the issue did not happen.
Deeply, in order to confirm the issue is related to @Embeddable, I added the following into persistence.xml to disable weaving,
<property name="eclipselink.weaving" value="false"/>
Then, while deploying, the issue did not happen.