SaaS Data Synchronization Common Issues -- Duplicate Data Synchronization / Duplicate Records

Phenomenon：

• Multiple records of the same business data appear in the target system

Common Causes：

• Lack of unique identifier (such as External ID)
• Bidirectional synchronization enabled simultaneously
• Retry mechanism lacks idempotency control

Recommendations：

• Configure unique keys (External ID / unique index)
• Avoid enabling multiple synchronization chains for the same object
• Check for duplicate writes caused by retry failures