Process &1 has no predecessor

What causes this issue?

Process &V1& has no process preceding it.
Only the start process is scheduled without any preceding processes in
the process chain.

System Response

The system is unable to activate the process chain.

How to fix this error?

Schedule the process so that it succeeds another process in the chain.

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.