fix-9120: Event is still saved when an invalid value is entered in 'F…

[ghost]

…loor' in the 'Sessions & Speakers' page

Fixes #9120

Short description of what this resolves:

• Event is still saved when an invalid value is entered in "Floor" in the "Sessions & Speakers" page

Changes proposed in this pull request:

• Event is still saved when an invalid value is entered in "Floor" in the "Sessions & Speakers" page

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	❌ Failed (Inspect)			Aug 17, 2023 9:16am

[mariobehling]

It is possible that there is no floor information.