title: when migrating from hibernate 5.2 to 5.3, hibernate tries to use a weird sequence
body: <p>After the upgrade from hibernate 5.2.17 to 5.3.6, i get this error :</p>
  
  <pre><code>Caused by: org.h2.jdbc.JdbcSQLException: Schéma "ENHANCED" non trouvé
  Schema "ENHANCED" not found; SQL statement:
  call next value for enhanced.SequenceStyleGenerator [90079-197]
      at org.h2.engine.SessionRemote.done(SessionRemote.java:623) ~[h2-1.4.197.jar:1.4.197]
      at org.h2.command.CommandRemote.prepare(CommandRemote.java:85) ~[h2-1.4.197.jar:1.4.197]
      at org.h2.command.CommandRemote.&lt;init&gt;(CommandRemote.java:51) ~[h2-1.4.197.jar:1.4.197]
      at org.h2.engine.SessionRemote.prepareCommand(SessionRemote.java:493) ~[h2-1.4.197.jar:1.4.197]
      at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1247) ~[h2-1.4.197.jar:1.4.197]
      at org.h2.jdbc.JdbcPreparedStatement.&lt;init&gt;(JdbcPreparedStatement.java:76) ~[h2-1.4.197.jar:1.4.197]
      at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:304) ~[h2-1.4.197.jar:1.4.197]
      at com.mchange.v2.c3p0.impl.NewProxyConnection.prepareStatement(NewProxyConnection.java:567) ~[c3p0-0.9.5.2.jar:0.9.5.2]
      at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$1.doPrepare(StatementPreparerImpl.java:87) ~[hibernate-core-5.3.6.Final.jar:5.3.6.Final]
      at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172) ~[hibernate-core-5.3.6.Final.jar:5.3.6.Final]
  </code></pre>
  
  <p>the id field is annotated this way :</p>
  
  <pre><code>@Id
  @GeneratedValue(generator = "enhanced.SequenceStyleGenerator")
  @GenericGenerator(
      name = "enhanced.SequenceStyleGenerator", 
      parameters = {
              // this value needs to be used when creating the sequence in "increment-by" clause.
              @Parameter(name = "increment_size", value= "10"),
              // default name : hibernate_sequence
              @Parameter(name = "prefer_sequence_per_entity", value= "false"),
              @Parameter(name = "optimizer", value="pooled")
      },
      strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator")
  @Column(name = "ID", nullable = false)
  private Long id;
  </code></pre>
  
  <p>With hibernate 5.2 it is working as expected, but not anymore with hibernate 5.3.</p>
  
  <p>The migration guide here : <a href="https://github.com/hibernate/hibernate-orm/blob/5.3/migration-guide.adoc" rel="nofollow noreferrer">https://github.com/hibernate/hibernate-orm/blob/5.3/migration-guide.adoc</a> do not reference any change on sequence generator.</p>
  
  <p>What could be the issue ?</p>