YAxisField first input parameter bug

Title

Regarding the first input parameter of the YAxisField, it is not possible to delete the entire value in the input field.
One digit always remains.

Steps to reproduce the bug

Click Edit Graph.
Go to Appearance Section.
Try to remove the value of the first input parameter of the YAxisField.

Resulting and expected behaviour

Resulting: See title
Expected: It is possible to delete the entire value.

Screenshots / screen recordings

Technical Data

pass

System Information [if necessary]

pass

Impact [If known]

pass