they change to another number of the editor savefile. I use LOTBG and DF11faces (see links)
I want to delete the "older players" like beckenbauer, denis law, baresi, etc. and only play with "younger" like ronaldinho, rivaldo, beckham, etc.
So I delete them in the fm editor and save a new file which I load in FM.
But when I make a new start, ronaldinho, rivaldo, beckham, etc get the numbers of beckenbauer, denis law, baresi, etc - So their player pic change from ronaldinho to beckenbauer, but the attributes, position, nationality stay the same.
(I dont know if it is random, but only the editorfile players change ID - the untouched from the savefile stay untouched as far as I saw)
I also deleted cache and reload the pics.
afterwards when I reload the edited savefile in editor, the numbers of the players are also changed in the editorfile, like in the game itself. They stay constant (not changing every load - just if I delete players again). It feels like the deleted players IDs redistribute to the left over players but not editing their attributes etc.