@alan18080 

The Postgres DB only holds metadata and does not contain the actual datflow in NiFi-registry.  The version controlled dataflows are stored in the configured FlowPersistenceProvider.   So if you are not preserving the actual flow contents, then the metadata loaded from your postgresSQL will not find it after redeployment.

I would also recommend upgrading your NiFi-Registry and NiFi versions. NiFi-Registry is going on 4 years old.

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Thank you,
Matt