How can I edit inactive user's comment on jira ticket?

[Giftoria PTY LTD]

I have some users in my project and we are not working with them anymore, but I need to either delete their comment or edit them, as I don't want our new recruit to be able to read them.

[Rob Horan]

You need permission to edit or delete all comments.

[Giftoria PTY LTD]

but I am the account owner, how come I don't have permission my self? 

[Rob Horan]

Have you looked at the permission scheme?

[Aaron Williams]

as a site admin, you still need the correct permissions for that specific project - the only constant right you have is to access project settings, where you can edit the people, the schemes, etc.

Look at the permission scheme to check what role has the 'delete other people's comments' (and related) rights, and check if you have that role on that project

This page (alter the section at the top to change to your instance type) goes into much more detail about permissions.