Duplicate value returned in EGO_ITEM_EFF_B Table

Summary

Desire to know what the difference is in the ACD_TYPE meanings when writing a report, and how to choose correct record.

Content

Hello, 

Our goal is a custom report to compare attributes and their data, but are seeing duplicate items returned.  

Example:

We see one item appear twice for the same context and same Organization ID. The duplicate is only occurring in our 'General' context. Other contexts return the correct information.

We are searching for a way to filter out the duplicate, and want to know which fields we can use to return the correct record. The ACD_Type column returns ADD and PROD. In Oracle documentation I am not seeing what PROD means.