Razer Blade 15 Advanced - inserted M&B Key SSD in M Slot

I need help! A few days ago, i inserted a B&M Key SSD in my Razer Laptop, to save my brother's Data - so there were different Windows and drivers was installed. But it booted and worked. After this, I re-inserted my M - Key SSD, but there I faced the Windows Troubleshooter Tool, and continue ist not working. I tried all available options, but nothing seems to work. Also reseted the BIOS, but also no effect. Does anyone know how I can fix this?