error  ocurred -1

Hi

First follow the general steps here:

If you see an error when you update or restore your iPhone, iPad, or iPod - Apple Support

If the issue then persists, follow the instructions here for error number 1:

Get help with iOS update and restore errors - Apple Support

The error -1 is almost always going to be a hardware error or a result of a jailbroken iPhone or one that has had the version of iOS rolled back. If you have never jailbroken or rolled back your version or had it hacked to unlock it then you will need to get it serviced.