fix-8850: Schedule displays sessions twice

[ghost]

Fixes #https://github.com/fossasia/open-event-server/issues/8850

Short description of what this resolves:

Schedule displays sessions twice

Changes proposed in this pull request:

Schedule displays sessions twice

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Checklist

• [x] I have read the Contribution & Best practices Guide.
• [x] My branch is up-to-date with the Upstream development branch.
• [ ] The acceptance, integration, unit tests and linter pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)

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Name	Status	Preview	Comments	Updated (UTC)
open-event-frontend	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 14, 2023 9:34am