Beginner. MPQ Editing War3Map.J. Save file not valid?

[lota7]

Hello,

I'm a new at MPQ editing and read some tutorial on how to edit war3map.j, and I did something as simple like changing a string.
I saved and inserted it back into the MPQ and I see that the string is shown when i start it ingame. So i know I did correct there.

Problem is, the save file I used to have is no longer valid? It works on the original map, but not on the hacked one.
What could be the reason for this?

Does the map have a checksum when generating the save file encrypted code?
Wouldnt that be a nightmare each time creator makes changes?
It's not timebased, as I can change the save file back and forth from valid save files on original game.

Using same account.

THe location of the file is different location /folder, but name is exactly same.

What more could be the reason why my save file from original game is not properly loaded on the hacked one?

The map I am conducting my tests on is Heroic Origins Galaxy TD 13.8H.
13.8G has already been fulfilled and the save file worked great using devoltz map, but I am honestly not good enough at coding to see where I went wrong resulting in save file not being recognised in my version.

Thankful for any help.