Cannot Change Methode Visibilty

hi, 

basically I am redefining an inherited method. In this method there is a call to another methode in the super class that carries the same name.

As I wanted to activate the redefinition an error occured which states that the methode called in my code is reither unknown or protected or private which means I need to change visibility. Long story short I could not change the visibility in the change options of the methode.

This is my first post so any help is appreciated 

Thank you in advance

 

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