Windows 10. accidental change of my hdd disk id

Sooo, the whole situation is strange as hell... So i accidentally changed my hdd disk id using diskpart After changing the id i restarted my computer. Blue screen appeared with 0xc000000e error code. "Selected disk is inactive or not connected. " I made a recovery usb stick. Plug it and restarted the computer. I tried to recover the original disk id but i forgot it (Yeah, im dumb.). So i decided to reinstall windows 10 on my hdd. When selecting the path of installation(Disk 0, Disk 0 partion 1 etc) i selected my hdd disk with 124 gb of free space. It was my hdd. But a message popup with text "Can't install windows system on this disk. Selected disk contains partion label MBR. In systems with EFI Interface, windows can only be installed on GPT disks. "

Is my hdd not a gpt disk? Am i able to change the id back to normal? Do i need to buy a whole new disk?

Please help.