How To Fix UCT8061 - Mapping rule for &1, row &2: "Apply rule" operator &3 contains an error

SAP Error Message - Details

• Message type: E = Error

• Message class: UCT8 - Message class for UCT8(mapping)

• Message number: 061

• Message text: Mapping rule for &1, row &2: "Apply rule" operator &3 contains an error

What causes this issue?

The mapping rule for target field &V1& contains an <ZK>apply existing
rule </>operator in row &V2&. The mapping rule this operator applies (
&V3&) contains errors.

System Response

The settings cannot be saved. The system issues this error message along
with other messages that explore the cause of the error found in the
reusable mapping rule.

How to fix this error?

Review the error messages and correct the reused mapping rule - either
here in Customizing or where the mapping rule was originally defined.

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.