Hi @Manisha Gulati welcome to the Atlassian community.
Even though I haven't come across this situation, after skimming found the following links.
If you found an answer from the above two links, then choose "accept answer" to my post. Else, kindly update this thread with your found solution for benefit of new members.
Stay safe and stay healthy.
When using an Atlassian account that is not managed, it’s possible to change the email address, but we often receive the following notification on the email that we want to use: Sorry, we couldn'...
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