Dear Pranav,
By your own admission, you had left your immediate preceding company on a bitter note and that too just a year ago. Now, what exactly are the compelling circumstances that make you rejoin the company?
Life is non-linear or unpredictable. Therefore, it is better to leave the door ajar that could give in to a re-entry. But your affray with the manager has closed the door of the previous company tightly. Your reporting manager is ensuring that the doors are closed permanently too.
There is no solution to this problem as such. Any other manager in her place would have reacted samely. Just think for a while about any manager in her place. He/she also would have frustrated your efforts to rejoin. How awkward would it be for the Manager to face you? While children may forget and regroup after the fight, but it is uncomfortable or constraining for adults.
Therefore, the only suggestion that can be given is to let go of the situation and attempt to get a job somewhere else.
Thanks,
Dinesh Divekar