DCL Source contains warning &1

DCL Source contains warning
Status ATC check for DCL Sources reports the warning message.

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?

Open the DCL Source in ADT. Modify the Source to resolve the reported
warning. Then syntactically check and activate it. Finally transport the
DCL source.
<Persisted Object Status Results> of transaction SACMOSM that employed
to status ATC-check of the DCL Source: Finished date and time: on &V1&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.