Ran into this today... I was going to email support but... I got annoyed 🙂
The answer is:
MSI Package only makes MSI fields visible to the Sys Admin profile by default - So you're going to need to check field level security and make sure your Marketo Sync user can see the fields
Some of the fields have been renamed in the new package but the error message hasn't been updated. So "Relative Urgency" is now "Urgency" and "Priority" is now "Engagement"
If you go through the list of these 5 fields and make sure they are visible to your Marketo Sync user - everything should be fine
Relative Score Value
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