Conversation so far:
Did Devika Rani elope?
The two co-stars developed a romantic relationship, and during the shooting schedule of Jeevan Naiya, Devika eloped with Hassan.
When did this occur?
CANNOTANSWER.
What movie were they working on together?
Jeevan Naiya.

Question: Why did they have to elope?
Self-contained rewrite: Why did Devika and Hassan have to elope?