Upgrade from OJS 3.1.2-4 to 3.2.1-1 fails: A database error has occurred: Duplicate entry '0-1' for key 'citations_publication_seq'

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Hi @Franklinx,

Have a look at this thread: OJS upgrade error (DB: Column 'publication_id' cannot be null) from 3.1.0-0 to 3.2.1-1 - #4 by kasioumis

Regards,
Alec Smecher
Public Knowledge Project Team