No &1 defined

What causes this issue?

In the Customizing for rule structure (view V_LRM_RE_RES_STR) for object
category &v2& and policy category &v3& the entry for &v1& is probably
missing.

System Response

Processing is terminated.

How to fix this error?

Check whether the Customizing for rule structure (view V_LRM_RE_RES_STR)
for object category &v2& and for policy category &v3& is correctly
maintained.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.