Describe The Bug
When navigating a series from the comic details page, the previous issue button goes to the oldest or first issue in the series and not the previous issue.

To Reproduce The Bug
Steps to reproduce the behavior. Please be as complete as possible and describe the exact steps and values used to cause the error:

1. Go to the details for a comic in a series.
2. Click on the Previous Issue button.
3. The oldest issue in the series is shown.

Expected Behavior

1. The previous issue in the series should be shown.

Operating System
Where is ComiXed running?

• Windows
• Linux (any distro)
• MacOS
• Docker

Database
What database is ComiXed using?

• Postgres
• MySQL/MariahDB
• H2 (embedded, generally unsupported)
• Other (please provide the name in the bug description)

Browser (If A Web Issue)

• Chrome
• Firefox
• Safari
• Other (if so, please provide a name)