The sample cannot be calculated automatically for a manual entry

What causes this issue?

For inspection type &v1&, you set the "Manual sample" indicator without
setting the "Manual sample calculation" indicator in the inspection
setup (Quality Management view of the material master).
This setting is incorrect, since it requires the user to enter the
sample size, while asking the system to calculate the sample
automatically.

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?

Either set the "Manual sample calculation" indicator, or cancel the
"Manual sample" indicator.

Error message extract from SAP system. Copyright SAP SE.