Different search fields: & <> &

What causes this issue?

You are maintaining a subtree created in CO (class "0H"). This subtree
must only contain groups with the same value in search field &V1&. Here
node &V3& has the value &V2& in the search field.

System Response

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

How to fix this error?

Use only nodes with value &V1& in the search field. Select only nodes
for search field &V1& and field &V4&.

Error message extract from SAP system. Copyright SAP SE.