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The field Attachments accepts many types of files in Jira Cloud and currently, it's not possible to restrict it to accept only one type or make it required to add one type of file and the other ones optional.
We have a feature request suggesting the implementation of this ability:
Please, click on vote and watch to receive updates about the feature.
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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