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This is an extension of Configuring Project Keys. Please try the process outlined there first.

You need to be on JIRA 6.1.x and above to be able to change existing project keys.

ソリューション

This process is how to set your project key pattern when you run into a case where you have an invalid character.

Jira をシャットダウンします。
Open your <JIRA-home>/jira-config.properties file

If you do not have that file already, you will need to create one (Configuring Advanced Settings)
Add the following line into that file
```
jira.projectkey.pattern = ([A-Z][A-Z]+)
```
The default project pattern is defined above. Please replace with your desired project key pattern.
Jira を起動します。