"java.lang.IllegalArgumentException" while running "initupgrade" when migrating.

Symptom

The error happens because the value set for DataType in Extensions.xml is not valid for some of the custom table entities.

The valid values are present in the <INSTALL_DIR>/repository/datatypes/datatypes.xml and documentation recommends using only those values.

Encountered the following error when doing " "initupgrade" (Step:4 under section 2.9.1 of Upgrade_Guide.pdf)
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[java] -genschemadiffofhistory:
[java] [echo] Generating schema differences for history tables...
[java] [java] java version "1.5.0_04"
[java] [java] Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_04-b05)
[java] [java] Java HotSpot(TM) Client VM (build 1.5.0_04-b05, mixed mode)
[java] [java] Exception in thread "main"
[java] [java] <Errors>
[java] [java] <Error ErrorCode="FileParseFailure"

[java] [java] <Attribute Name="ErrorCode" Value="FileParseFailure"/>
[java] [java] <Attribute Name="ErrorDescription" Value="FileParseFailure"/>
[java] [java] <Attribute Name="DirectoryBeingParsed" Value="/tmp/entities"/><br /> [java] [java] <Attribute Name="FileBeingParsed" Value=""/>
[java] [java] <Error ErrorCode="java.lang.IllegalArgumentException"

[java] [java] <Stack>java.lang.IllegalArgumentException: Extn_Sparepart_Type is not a valid attribute
[java] [java] at com.yantra.tools.entityguru.generator.Entity.process(Entity.java:539)
[java] [java] at com.yantra.tools.entityguru.generator.Entity.<init>(Entity.java:233)
[java] [java] at com.yantra.tools.entityguru.generator.EntityRepository.handleEntityElement(Entit yRepository.java:325)
[java] [java] at com.yantra.tools.entityguru.generator.EntityRepository.processXML(EntityReposito ry.java:292)
[java] [java] at com.yantra.tools.entityguru.generator.EntityRepository.parseHangOffXML(EntityRep ository.java:235)
[java] [java] at com.yantra.tools.entityguru.generator.EntityRepository.getEntityRepositoryFor(En tityRepository.java:854)
[java] [java] at com.yantra.tools.entityguru.generator.EntityGenerator.callable(EntityGenerator.j ava:282)
[java] [java] at com.yantra.tools.entityguru.generator.EntityGenerator.main(EntityGenerator.java: 610)
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