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# New format for subaccount IDs

> New subaccounts get a shorter ID format, and existing subaccount IDs stay the same.

Subaccount IDs used to be long numeric strings, such as `1787331136169x116288779214334560`. New subaccounts now get a shorter ID, such as `test_subaccount_hO0KX`.

Existing subaccounts keep their current IDs, so nothing changes for them. If your integration checks the ID format, update it to accept both.