Please advise if upgrade EOSIO from current version to newer version. It's need Data Migration or not


Now I already have EOSIO Private Blockchain for 4 VM Server (Ubuntu Server 18.04 TLS) for nodeos and 1 Wallet (Keosd) in Client (Ubuntu Server 18.04 LTS) as diagram below


All Machine install EOSIO Software and CDT by compile from Source Code according to Official Document from

But I’m not sure if upgrade EOSIO in VM Server (All 4 Nodes) from current version to newer version in future. It’s need Data Migration or not. Please advise me because I tried to search in web site and internet before but not found clearly answers.

Thank you.