### Begin of the deletion Before filing a report

_Before you file a report, please ensure you are running the latest version of OpenProject and_ 
_have searched for similar bug reports._

###End of the deletion Steps to reproduce

Begin of the deletion _Please write down the steps to reproduce. Try to write down all necessary preconditions (what permissions do you have, are other users involved?). Example:_

End of the deletion 1. Accidentally create a work package with due date in 20275 (!)

2. Have other work packages around current dates

3. Try the PDF export to Gantt


### What is the buggy behavior?

Begin of the deletion _Please describe the bug in as much detail as possible. Example:_

End of the deletion * You will crash workers


### What is the expected behavior? Begin of the deletion

_Describe how the application should behave like. Example:_End of the deletion

1. The PDF export should be prevented or cancelled with an error