Smoothing factor may not exceed '1.00'

What causes this issue?

The smoothing factor indicates the weighting with which a new score for
a goods receipt is included in an already existing score.
Since, by definition, the sum of the weightings has the value '1.00',
it makes little sense to enter a value that is greater than '1.00'.

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?

Error message extract from SAP system. Copyright SAP SE.