Language export not respecting choice

Hi all,

I exported my custom Language and i selected only burning Board and WCF, no addons... yet when i want to install an addon with the imported lang, i get this message:

Fatal error: Could not execute prepared statement: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'wcf.acp.cronjob.description.cronjob28-2' for key 'languageItem'

This means the export still takes the addon strings with it and imports them and when installing an addon it gives the error above because the strings are already inside the database.. The workaround is delete the custom Language, install the addons and install the Language back....