Relationships for order &1 cannot be redirected

What causes this issue?

In process order &V1& phases are missing for the transfer to APO. The
system has attempted to divert the relationships of these phases to
their predecessors and successors. This lead to a situation that the
system could not resolve.

System Response

It cannot be guaranteed that the order was correctly transferred to APO
and that it can be successfully scheduled there.

How to fix this error?

This error usually only occurs if there are cycles in the relationships
of phases for a process order that are not transferred to APO. You
should therefore remove the cycles in order &V1& .

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.