The disk Macintosh HD can't be unlocked
If you can still boot into the Recovery or Internet Recovery please open the Terminal app from the Utilities folder and copy the result of 


  du -f


and 


  diskutil apfs list


It is likely there was an issue with the install/migration and depending of free space you might have to erase and reinstall the OS (for that please follow the Apple guide at https://support.apple.com/guide/mac-help/reinstall-macos-mchlp1599/mac)

Editing the name of the drives so they are unique will help you know which is which.