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[eclipselink-users] Baffling exception: Cannot find value in class indicator mapping in parent descriptor [null]

EclipseLink is telling me this:

Exception Description: Cannot find value in class indicator mapping in parent descriptor [null].

(Well, more specifically, this:

Runtime Exceptions:
---------------------------------------------------------

[EL Severe]: 2010-05-13 15:31:42.125--ServerSession(14434757)--Thread(Thread[main,5,main])--Local Exception Stack:
Exception [EclipseLink-0] (Eclipse Persistence Services - 2.0.1.v20100213-r6600): org.eclipse.persistence.exceptions.IntegrityException
Descriptor Exceptions:
---------------------------------------------------------

Exception [EclipseLink-108] (Eclipse Persistence Services - 2.0.1.v20100213-r6600): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: Cannot find value in class indicator mapping in parent descriptor [null].
Descriptor: RelationalDescriptor(com.foobar.party.jpa.NameEntity --> [DatabaseTable(foobar.Name)])

Exception [EclipseLink-41] (Eclipse Persistence Services - 2.0.1.v20100213-r6600): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: A non-read-only mapping must be defined for the sequence number field.
Descriptor: RelationalDescriptor(com.foobar.party.jpa.NameEntity --> [DatabaseTable(foobar.Name)])

).  NameEntity uses the TableGenerator style of automatic ID generation.  Additionally, I am NOT letting EclipseLink generate my tables.

So then: what sequence is it talking about?  Why would I need a mapping for a sequence, when I'm not using sequences?

Best,
Laird