Getting Error ORA-00001: unique constraint (FUSION.HZ_PARTIES_U1) violated while updating customer

Summary:

Hello Experts,
We are facing issue while updating customers. You may replicate the same by following below steps: -
1 person can replicate the error with 2 sessions, or 2 people can replicate.
Go into Customer Master and make a change, do not hit save yet.. in another window, go into CM and in a different customer make a change and hit save. When you go back to the first window and look to save your changes, you get the error.
Please see the below from my login on how this error normally presents:
‘I went into communications and entered a test contact. If you go into any other customer maintenance screen and make a change (made notes change on front page of a different account) and save it before you save on what you’re initially doing it will Error out. Two people cannot be making/saving changes in Manage Customers at the same time.