A PivotChart is connected to the PivotTable used to create it so every time you make a change to the PivotTable, the PivotChart automatically changes too. There are occasions when you might not want your PivotChart to change, i.e, you want to make it static.
Right-click the chart you want to make static and click Copy, or press Ctrl + C on the keyboard.
Click where you would like the chart to be placed, then right-click and click from the Paste Options, select the Picture option.
No changes to your PivotTable will be reflected in this static chart.