2914687 - "Too many values in first queue in function useOneAsMany. It must have the same number of contexts as second queue" using mapping in CPI

You see the error below running an iflow with mapping step using useOneAsMany function:

com.sap.xi.mapping.camel.XiMappingException: com.sap.aii.mappingtool.tf7.MessageMappingException: Runtime exception during processing target field mapping /ns0:<node>/<node>/<element>. The root message is: Exception:[com.sap.aii.mappingtool.tf7.rt.BehaviorInvocationException: Too many values in first queue in function useOneAsMany. It must have the same number of contexts as second queue.] in class com.sap.aii.mappingtool.flib7.NodeFunctions method useOneAsMany

SAP Cloud Platform Integration for process services 3.0 
SAP Cloud Platform Integration for process services 4.0

SAP HANA Cloud Integration, SAP HCI, SAP CPI, SCPI, tenant, IFlow, Integration Flow, deployment, HCI tooling, too, many, values, first, queue, function, useOneAsMany, use, one, as, many, same, number, contexts, second, queue, mapping, records , KBA , LOD-HCI-PI-RT , Integration Runtime , Problem