AnnotationException « Property « JPA Q&A

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1. org.hibernate.AnnotationException: mappedBy reference an unknown target entity property    coderanch.com

Hello ... I have a problem by mapping these two tables i want the keys that are mapped not to be generated... but to be entered manually .. I am new to JPA and trying some examples ... Can someone help ??? Create a row with isbn xx and insert by that isbn 1-2-3 Instances with data by that isbn the ...