The loop displayed cannot allocate the iterated values

What causes this issue?

The SAP System detected a loop in the receiver-sender relationships of
the iteration which has no receivers outside of the loop.

System Response

The iteration terminates with a divergence.

How to fix this error?

Divergent relationships recognized by the SAP System are displayed in
the following list based on an object in the loop.
Check all receiver-sender relationships in the loop.
Eliminated the false relationships.
To prevent termination, you may interrupt the loop at some point.
Ensure that an object in the loop does not allocate costs further, but
rather collects them.
Ensure that an object in the loop obtains a receiver outside the loop
to which it can allocate its costs.

Error message extract from SAP system. Copyright SAP SE.