Problem while installing El Capitan

Hello everyone

I got a new SSD drive, which requires to reistall my OS X.

I made a bootable USB containing El Capitan.

But at the end of the installation I get this error: Volume contains an OS X installation which may be damaged.

I read somewhere that I should update the date using termial. I did it, but the time zone has not changed, it is still PDT which I need it to be converted to CET.

I dont know if it is the solution or not. But any suggestion is highly appreciated.

Thanks