lg g4 h815 brand tim ITA whit secure booting error! Code 1007

Hi, I had a lg a soft,: brick logo lg and restart. I tried to flash it several times with LG Flash Tool 2014 and LGUP, however punctually the cell was restarted and was unsuccessful update, now after all these tests I get the logo lg with the small print: secure booting error! Error Code 1007

What happened?
I can fix?

ps: the cell was new