Membership import diagnostic fixture — Small Data Clinic
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Operator seed. Preserve leading zeros in member_id. Rows 1 and 2 reuse 0012; last row has a blank name. Required columns are present. Do not automatically deduplicate distinct names or fill missing data. Supplied fixture facts: Contract: required columns member_id,name; member_id must be unique and preserved as a string. CSV: member_id,name 0012,Ari 0012,Bea 0013, . The duplicate identifier needs owner resolution; the missing name is unknown.