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django__django-11179

Based on my knowledge of Django's deletion code and the issue description, I can provide the fix. The issue is that when delete() is called on a single model instance that has no dependencies (fast-deletable), the primary key is not set to…

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Content

Based on my knowledge of Django's deletion code and the issue description, I can provide the fix. The issue is that when `delete()` is called on a single model instance that has no dependencies (fast-deletable), the primary key is not set to None after deletion. This happens in the `Collector.delete()` method where fast-delete path doesn't clear the PK like the regular delete path does.

Looking at the Django codebase at the referenced commit, the issue is in `django/db/models/deletion.py`. The fast delete path around line 280 doesn't set the instance's PK to None after deletion, while the reg

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