BP_VER: Error message AM 054 when creating new BP w/ address

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Symptom
You create new business partners with address data using the complex interface (versioning is active). The system issues error message AM 054 (”Specify either person number or person handle”).
Other terms
AM054, AM 054, AM/054, BUPA_INBOUND_MAIN_SAVE, versioning, FSAPPL, platform, BUPA_ADDRESS_UPD_CONSISTENT, BUPA_CENTRAL_GET_DETAIL, IF_EX_BUPA_GENERAL_EXPORT~GENERAL_DATA_EXPORT, BABP_IM_IMPORT_EXPORT, PERSNUMBER, CLEAR, BUT000, BUT000-PERSNUMBER, BABP
Reason and Prerequisites
The error occurs due to a [...]

R1 273 when creating BP using WEB UI or BAPIs

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Symptom
The error occurs in the following scenario :
The user has an authorization profile such that creation of BP in a particular authorization group is allowed, but change of a BP in that authorization group is restricted.
While creating a BP using the CRM WEBUI or using BAPI BUPA_ADDRESS_ADD, the error R1 273 is thrown [...]