If the Agentforce Data Library Status is "Ready," the Identifying Fields in Field Settings is grayed out and cannot be changed.
This article explains the resolution.
If the Agentforce Data Library Status is "Ready," related internal objects are generated, so the Identifying Fields cannot be changed.
Once set, the Identifying Fields cannot be edited.
If you want to change the Identifying Fields from the current value, create a new Data Library and replace the current one using the following steps:
Create a new Data Library with the correct Identifying Fields, separate from the existing Data Library.
Replace the usage of the existing Data Library with the new Data Library.
Additional Information :
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