@Klonan: Thanks for the command.
@jodokus31: Of course not, otherwise it wouldn't be a problem.

1. What did you do?

Started the game on factorio vanilia with the mods LTN, Electric Train, Multiple Electric Trains, Realistic Electric Trains.
Accidentally open the save game with Krastorio and saved it after some playing.
Reopened the with factorio vanilia.

2. What happened?

The recipe for ...