Rev. 2 code 73 is one of multiple older codes associated with Rev. 2.1 class 73 Activities of advertising, market research and public relations.
Potential impact
Datasets, CRM segments, KYC rules, reporting logic, and historical joins may need review because the activity scope is not a simple unchanged carry-over.
What to check next
Confirm the target version field and update references where Rev. 2.1 is required.