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Got this error again trying to add NERVOUS VENUS λλ²μ€ λΉλμ€ 1 - μμ€24.
It seems like itβs probably an ISBN issue, as all of the books mentioned only have ISBN10 numbers, all of which start with XX.
Another unknown error for [μ μμ±
]λλμ μ°λκΈ° - μμ€24, but this one has an ISBN13. 
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