DWH incremental job Fails due to duplicate keys in the fact table

Document ID : KB000125474
Last Modified Date : 10/04/2019
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Issue:
When running Load Data Warehouse job in Incremental mode we get below error
2018/12/17 13:06:31 - Error Message Variables.0 - Set variable ERROR_MESSAGE to value [Cannot insert duplicate key row in object 'ppm_dwh.DWH_X_RES_AVAIL_PER_FACTS' with unique index 'DWH_X_RES_AVAIL_PER_FACTS_U1'. The duplicate key value is (5004087, 3006971).]
Resolution:
DE46399, Fixed in 15.6