The last time we had a rider picked twice by the same team in the men's version, skidmark simply deleted said rider without offering a chance to replace. So I think it would be more in keeping with precedent to replace with PFP rather than offer free choice.
DkOne has PMed me: he (I'm assuming he, sorry if not) is most kicking himself over not having Van Der Breggen, but admits that she was never in his thinking, but that Ferrand-Prevot had been, so feels comfortable with that swap. I'll update the team list and do other spreadsheet tweaks hopefully tomorrow.