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[3.0.x] Corrected error message in Many-to-many relationships docs.
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@ -54,7 +54,7 @@ You can't associate it with a ``Publication`` until it's been saved::
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>>> a1.publications.add(p1)
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Traceback (most recent call last):
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...
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ValueError: 'Article' instance needs to have a primary key value before a many-to-many relationship can be used.
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ValueError: "<Article: Django lets you build Web apps easily>" needs to have a value for field "id" before this many-to-many relationship can be used.
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Save it!
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::
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