The repeat values in your hash mean that you cannot use them as primary keys for identifying a data set. Clever data structures in Perl will not help you if you are trying to use them as the keys in your database. There are a couple possible solutions here, depending on your needs. The most natural solution is to use whatever you index your database with to key your hash. Can you provide your db table structure, some sample data from your original hash and explain how they are related?
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