U cant there is nothing at all u can do u cant even reveg her her life cycle is over if u want to do this strain again you would have clip your clone before u flip her at around 4-6 weeks all this needs to occur within that time frame the timing has to be on point also if u can just find regular mixed seeds of the strain this could save u a lot of headaches👍👍🍻🍻
At this point it’s so far into flower your best bet would be to try and reveg it as it doesn’t have enough flowering time left for anyseeds to mature no matter who you pollenated it with