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Documentation step 3, post-import update
The part from "Then, start the Neo4J shell...:" up to and including "$NEO4J_HOME/bin/neo4j start" is outdated. The correct procedure with neo4j-4.4 and later is
If you did not run the import as user:group neo4j, fix db ownership: chown -R neo4j:neo4j $NEO4J_HOME/data
Start the database: systemctl start neo4j # or whatever is applicable on your system
Open a cypher shell: cypher-shell -d <your_database> -u neo4j
and create the following uniquness constraints: CREATE CONSTRAINT FOR (a:Address) REQUIRE a.address IS UNIQUE; CREATE CONSTRAINT FOR (o:Output) REQUIRE o.txid_n IS UNIQUE;