Lloyd - the restore basically auto-creates the agg policy for you from the backup. If I read your question correctly and you already have unresolved KV store issues - I would prioritize fixing those or creating a manual aggregation policy based on the guidance here https://docs.splunk.com/Documentation/ITSI/4.3.1/Configure/HowtocreateAggregationPolicies rather than doing the KV store import.
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