Board Thread:Bug Reports/@comment-75.136.40.112-20171227002823/@comment-27219153-20171227003411

When your laptop shutdown the player data must have not gotten saved properly. The game can't read the file anymore so it would create a new one.

If the old file is still there, you could see if it is readable in a NBT editor and if so copy the good parts over to your new player data file.