Solve validation constraints for entity relationship using @Valid annotation Spring boot

If you face an exception similar to the following one, then there is an easy solution

List of constraint violations:[
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In case you are wondering what is H2 database:

H2 is a relational database management system written in Java. It can be embedded in Java applications or run in client-server mode. The software is available as open-source software Mozilla Public License 2.0 or the original Eclipse Public License.