What is the difference between express-session 's req.session.regenerate method and direct assignment?

problem description

what"s the difference between creating session through the req.session.regenerate method and req.session.username = username?
I have used these two methods respectively, but I don"t find any difference. There are similar problems on stackoverflow, but I don"t quite understand. Who can tell me the address of
the original stackoverflow: https://stackoverflow.com/que.

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Mar.11,2022
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e48c06-44467.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e48c06-44467.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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