linking multiple entites on BPF

Hi All,

As per my business scenario I need to create BPF on three entities  like Entity1, Entity2, Enitity3 and BPF starts at Entity1 and ends with Entity3

At stage 2 On Entity2 record creation, I have a lookup on entity3 to select one record

At stage 6 its asking me create new record for Entity3, but since I have already selected Entity3 in stage2 as lookup, I need to use the same in further stages. How can I achieve this?

Regards,

Persis