fix mayDeleteFoodSharePointWallPostOfRegion

Fix for !1667 (merged)

What does this MR do?

Fixes https://sentry.io/share/issue/d0840161ff544234a889c600f37de41b/ referenced here : !1667 (comment 413773351)

How confident are you it won't break things if deployed?

quite

Links to related issues

How to test

Steps a reviewer can take to verify that this MR does what it says it does e.g.

I really don't how this was caused as i couldn't provoke it - but sentry says it did happen.

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Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• set a "for:" label to indicate who will be affected by this change
• use "state:" labels to track this MR's state until it was beta tested
• added an entry to CHANGELOG.md
• add a short text that can be used in the release notes
• Once your MR has been merged, you are responsible to create a testing issue in Beta Testing Repo:
  • Consider writing a detailed description in German.
  • Describe in a few sentences, what should be tested from a user perspective.
  • Also mention different settings (e.g. different browsers, roles, ...). how this change can be tested.
  • Be aware, that also non technical people should understand.

Release notes text

(A short text that will appear in the release notes and describes the change for non-technical people. Not always necessary, e.g. not for refactoring.)