Dua

Can you make dua to marry someone that has accepted another marriage proposal that’s not yours? I have history with a person and we both liked one another but something happened to create distance, now the person has accepted a proposal to marry a separate person. With dua we can ask Allah to change qadr, so can we still ask Allah to not to let the person we love not marry another person but to marry you? The person I like has accepted another proposal, but I really like them so I am making dua the proposal they accepted doesn’t actually happen and we reunite - I am not sure if this dua is prohibited?