We have activated Dunning with respective to "Dunning Collection Strategy".
1. We are running Dunning (FPVA) with parameters - Parallel processing object GPART and selection parameters with full GPART range
2. We are running Dunning (FPVB) with parameters - Parallel processing object VKONT and selection parameters with full VKONT range
However, Dunning is updating the field XMVKT "Contract Account not unique" in FKKMAZE and collection step in blank. Moreover, there is no entry in FKKMAKO header table. But the collection step is updated in document level.
As per analysis, we observed that this is happening to accounts where BP having multiple contract accounts.
Appreciate if you can suggest what is the route cause for this issue.