@premsagar-m
Please find the below possibilities:
1. Normally this happens when there are multiple deployments happening on a single cloud account. A suggestion from adobe is to have 1 or 2 deployments at a time.
2. Check if your deployment queue is clear for this particular environment, if yes, clear the queue and try once again.
Even I faced this issue long back and (2) was the cause of our issue.
If this issue is occurring multiple times suggest raising an adobe ticket.