Getting error You must map quantity and UOM attributes to persistent attributes in service map

Summary:

After the Usage event creation and running ESS Job Rate Subscription Usage Events getting error 'You must map quantity and UOM attributes to persistent attributes in service mapping for all usage charges in the rate plan'

Content (please ensure you mask any confidential information):

You must map quantity and UOM attributes to persistent attributes in service mapping for all usage charges in the rate plan (Message Name: OSS_EVNT_RTNG_QTY_UOM)

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