Stability study BB &1 in plant &2 does not contain an initial sample

What causes this issue?

You can only use a stability study building block in the trial if you
have defined at least one initial sample.

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?

Define at least one initial sample in the stability study building block
in order to use this building block in the trial, or choose a different
stability study building block.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.