Hi Rishav,
This means the underlying DMO (Lead_Data_for_Training__dlm) that the module expects hasn't actually been created/deployed in your org yet, even though it's showing as selectable in the picker (a stale UI list vs. real DMO existence is common here).
Check:
1. Go to Data Cloud > Data Model, and search for Lead_Data_for_Training. If it's missing, an earlier step in the module (creating this custom Data Model Object or mapping a data stream to it) wasn't completed or didn't finish deploying.
2. If it exists but Model Builder still can't find it, check its deployment/activation status — a DMO can show in the object list before it's fully "live" for consumption by Model Builder.
3. Go back to the module step just before Model Builder and confirm you completed and saved the DMO/data stream setup fully (including any "Deploy" or "Save" action), not just created a draft.
4. If everything looks correct, wait 15-20 minutes and retry — DMO propagation to dependent services like Model Builder can lag slightly after creation.
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