Ok I know its easy to use cheats but you broke your game by using them.
You must do all and I do mean all on line courses, if you cheat your stats you break your game.
Do not cheat stats until you get the stat to over 100 points in game then you can cheat all you want to but there are triggers in the first 100 points for all quest and if you cheat before 100 points you break your game.
This is from your game.
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Do not cheat relationship until you reach what you can get in game because there are internal counters that do not change when you cheat the relationship.
Here is my game stats
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I know Lisa and Alice has more than 1 counter on relationship so don't cheat them up until you reach what I have here.
As for mom I really don't know if relationship is even used in this game.
Yes you save game is broken and you need to start over.