Hi Yehonatan - Welcome to the Atlassian Community!
If you are talking about the key (or ID) of the issues, that is not possible and you have no control over how those are populated. The key of the issue will be the project - sequential number. You have cannot change that.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.