the usual scenarios: your playing dynasty and all of a sudden you wanted to add player/s into your dynasty (ex: jordan, malone or kemp and those players who's under 65% overall rating (both current and retired players) that is not playable in dynasty anymore.
note: just adding your player into your dynasty will surely crash your game!!!
how to avoid that???
JUST FOLLOW MY SIMPLE STEPS CAREFULLY:
1 open dbcommander
2 open your dynasty save folder
3 go to players.dbf
4 check the names from bottom part and you will see the generated rookie names for the upcoming dynasty draft (ex names: pau bryant, karl stackton, scottie jordan, kevin westbook, blake paul or lamarcus oden)

5 for example you want to add karl malone to your dynasty season 2 or whatever season 3,4,5,6,7-25.
6 using you dbcommander open both: roster save(that contain karl malone name or other player/s that you want to add) and your dynasty save folder players.dbf and appearance.dbf
7 now don't miss this part, we gonna replace one of the upcoming rookie, ex you choose lamarcus oden and his playerid is 5555, now copy karl malone players.dbf value and paste it to lamarcus oden players.dbf and do the same process to lamarcus oden appearance.dbf (5555) and copy paste karl malone appearance.dbf
8 again don't miss this part, to complete the process.. go to players.dbf again and change karl malone playerid back to 5555 and do that same thing with appearance.dbf appearid 5555
9 the final part: in players.dbf change karl malone team:50 cashteam: 50 then save and load again your dynasty and now you will see karl malone as a free agent in your dynasty and ready to play.
back up first your dynasty just in case anything goes wrong! and if you have question just write it here.