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    • org.apache.openjpa.persistence.ArgumentException: Attempt to assign id "0" to new instance "my.package.A-0" failed; there is already an object in the L1 cache with this id. You must delete this object (in a previous transaction or the current one) before reusing its id. This error can also occur when a horizontally or vertically mapped classes uses auto-increment application identity and does not use a hierarchy of application identity classes. FailedObject: my.package.A-0 at org.apache.openjpa.kernel.ManagedCache.commitNew( at org.apache.openjpa.kernel.BrokerImpl.setStateManager( at org.apache.openjpa.kernel.StateManagerImpl.commit( at org.apache.openjpa.kernel.BrokerImpl.endTransaction(
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