a way to erase earlier moves from a pgn while keeping the rest

I was wondering if there is a way to take a pgn and say for example go to move 15 in a game that had a total of 40 moves, and be able to erase the first 15 moves but keep the remaining ones.

I want to be able to important a game from a certain position to chessable, istead of having to start from the first game.

So I found a way to 'strip' previous moves to the beginning using scid vs. PC.

Still it would be nice feature in lichess to add.

Erasing moves also erases possibilities for threefold repetition, so it isn't the same game anymore.

You can just have the game from position FEN and then delete the moves you want to delete.