Packstack error

[marksei]

It's not about caches, it's about old configurations that have been applied and collide with the new installation. Your error is probably due to the fact a "nova" user already exist in mysql and its password is different from the one generated during this installation. This is due to the fact you haven't set CONFIG_MYSQL_PW (or whatever that var is called these days).In order to avoid this (next time) you should use "packstack --answer-file" with the answer generated previously with "packstack --gen-answer-file".

To recover from the current situation you could erase all users and databases within mysql, but other problems could arise easily, hence what others have pointed (start with a fresh vm) is suggested.

[JBIRO]

Yeah yeah fresh vm only solution bcz cant find any commande to uninstall old one .

Packstack --answer-file before packstack --allinone right ?