Attribute "integer" in organization: -1 not allowed


we used to have an integer parameter in our organization, that could be -1, 0, and up to 99.999.
Since quite some time we are now not allowed to use “-1”.
It is also said in the edit parameter dialog.

Is there a reason for such a change?
Is there a way to get the old behaviour back and allow -1? E.g. via a different type?
Is this a regression?


  • Used Zammad version: 3.1.x
  • Used Zammad installation source: package
  • Operating system: Linux
  • Browser + version: Firefox, latest

Expected behavior:

  • -1 should be allowed for integer

Actual behavior:

  • fails to save

Steps to reproduce the behavior:

  • add an attribute for organization
  • select integer and try to use “minimum” -1

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