Not able to create a custoemr with Jan 1900 as starting date in PROD environment

Summary:

When we create a customer in TEST and other non‑production environments, we’re able to use 01.01.1900 as the start date at party, Account and site level, without any issues.

However, when a user tries to create a customer with the same dates in the PROD environment, they receive the following error:

“The date range for a child record must be within the date range of its parent record. (HZ‑120150)”

What’s interesting is that earlier this month another user successfully created four customers in PROD using 1 January 2000 as the establishment date at the Party, Account, and Site levels, and those were created without any errors.