_5C in pk of related model turns into back slash (\) in admin url

[Nikolay Fedorov]

I have two models: a Video and a Question. The "video" field in the Question model is a ForeignKey to the video model. If the video has pk = 'Ml_XFX_5CYo' and it is assigned to a question, then when you try to view or edit the video from the question page in the admin section, clicking on the link results in an error that the video with pk = 'Ml_XFX\Yo' does not exist. For some reason, when trying to access the video from the question card, 'Ml_XFX_5CYo' turns into 'Ml_XFX\Yo'. I think problem on django.contrib.admin.utils.quote function (maybe not). Presumably, the problem is that the url conversion or protection mechanism considers _5C as %5C and Ml_XFX_5CYo' turns into 'Ml_XFX\Yo'.

[Sarah Boyce]

Thank you for the report! I replicated and think this is a duplicate of #30386