Hello,
Even after removing the mod we cannot go back to normal ending spot

Oh right.
I have not tested it but it makes sense, because I turn off old trigger in order for it to not fire up

I would need to make mod or setting or command to revert effect.

I ll try to send you command later today

This would be nice yeah :)
Maybe juste a parameter in the mod to choose ending condition. By doing so, it may be easy (I suppose but don't know) to offer other choices (like finishing a science research with the promotheum science, or also collecting XXX prometheum asteroids, ...)

This command will restore the default victory of reaching the solar system edge:
/c remote.call("space_finish_script", "set_no_victory", false)

It will however disable your achievements as it's /c console command ...