The bookmark makes selections in field "xxx". The field was not found in the data model.
This bookmark makes selections in a field not found in the data model. This can occur when a bookmarked field is dropped from the data model in a later script update.
Consider what impact the missing field may have on the usefulness of the Bookmark. It may be that you want to retain the bookmark as it selects other useful fields or sheet position.
To prevent the flag from surfacing again in future collections, delete the bookmark or recreate it without the missing field.