Property tree &1 was set as the default

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

The property tree &V1& is used to display the properties if the
exception rule described below does not apply. The tree was entered in
the user parameters at the same time under the ID <LS>ES6</>.
A property tree can be assigned for a specification type in Customizing.
If this is the case, this property tree always overrides the property
tree set in the user parameters.
As long as you do not change this setting, the property tree specified
is displayed. This setting is retained even after you have logged off.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.