2021-02-15 21:38:28.453 WARN 5473 --- [ main] o.s.data.convert.CustomConversions : Registering converter from class org.postgresql.util.PGobject to class name.nkonev.jdbc.repository.CustomerData as reading converter although it doesn't convert from a store-supported type! You might want to check your annotation setup at the converter implementation. 2021-02-15 21:38:28.453 WARN 5473 --- [ main] o.s.data.convert.CustomConversions : Registering converter from class name.nkonev.jdbc.repository.CustomerData to class org.postgresql.util.PGobject as writing converter although it doesn't convert to a store-supported type! You might want to check your annotation setup at the converter implementation.