Data migration between different versions of Neo4j

Neo4j Graph Platform Operations
1

We recently update our community Neo4j server from 4.0.2 to 4.2.4.
What is the least painful way of migrating our graphs from 4.0.2 to 4.2.4?

Thank you

2

If this is an in place upgrade then simply update conf/neo4j.conf and set dbms.allow_upgrade=true ( Configuration settings - Operations Manual )
and restart Neo4j