For those unaware, the potential of a player in FM21 is defined by their PA value, or Potential Ability. It goes from 1-200. A lot of players have a fixed value, for example Mason Greenwood's PA is a fixed value of 172, meaning this will be his potential every single game. However, for example, Erling Haaland has a PA range of -95 (don't ask, it's what SI named it), which means his potential will vary from 160 to 190 in every new game. This means that sometimes he a good player for most top European sides (160), but other times he's a near-guarenteed Ballon d'Or winner (190).
This database makes it so that every player with a fixed value, gets a PA range, matching somewhat to their fixed value. For example:
Mason Greenwood: Fixed PA: 172 - New PA Range: 160-190
Ethan Ampadu: Fixed PA: 157 - New PA Range: 140-170
Japhet Tanganga: Fixed PA: 146 - New PA Range: 130-160
And so on, so forth :-)
Also, this is a .fmf file. This means that it goes into your "editor data" folder, which is usually located at "\Documents\Sports Interactive\Football Manager 2021\editor data", or whereever you've chosen to place your user data. But if you've placed in at a non-default location, you probably don't need me to explain this to you. You also must start a new game to select this file and use, it won't work on existing savegames.
This will add a bit more variety to your save games, and hopefilly make scouting the next superstar a little more fun!