After selecting the version type on the configuration page (affects version, fixVersion, or your special versionsuch as "Fixed Version" for creating a field like "Fixed in Bundle" or choosing "Affects Version" for creating an "Affect Bundle" field), it displays the bundles associated with the component and version pair in the issue next to the respective custom field. It also searches for the versions of these bundles and includes them in the display. For example, if you want to create a custom field named "Fixed in Bundle," you can select the "Fixed Version" type, representing the version where the related bundle is fixed. Similarly, for creating an "Affect Bundle" field, you can choose the "Affects Version" type, representing the version that affects the bundle. This way, users can easily track a specific bundle and its associated versions more efficiently.
Adding custom fields to Jira is already well documented in Jira's own user manuals so it will not be duplicated here. One thing you should notice is, calculated fields are not available on issue update screens, they are only visible on view issue screen or as a column in issue navigator. So "Fixed in Bundle" and "Affects Bundle" fields are not available on issue create or edit screens.
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