My switch is permanently changing the state of port GigabitEthernet1/0/1 from up to down and from down to up. What can I do?

Console Output:
[![enter image description here](https://i.stack.imgur.com/GqX5Q.png)](https://i.stack.imgur.com/GqX5Q.png)

Port configuration:
[![enter image description here](https://i.stack.imgur.com/M898h.png)](https://i.stack.imgur.com/M898h.png)

Sorry, I have only these pictures.
I'm using a Cisco Catalyst 2960-X Series.