Wrong customizing data for &1, only one default normalization is allowed

What causes this issue?

In Customizing, multiple normalizations are defined as default; however,
only one normalization is allowed as default.

System Response

Normalizations are critical for check execution and this problem can
cause inconsistencies.

How to fix this error?

Make corrections in the <LS>Specify Compliance Views and Normalizations
</> Customizing activity under <LS>Product Compliance for Discrete
Industries -> General Configuration -> Compliance Object .</>

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.