Issue
Your connector forced a re-sync due to the following error message:
"reason":"Snapshot is currently invalid, it has been too long since the last
incremental update."
Environment
Connector: SQL Server
Answer
This error is typically caused by one of two reasons:
1. Your retention period is too short.
2. DDL changes in your source database.
Cause
You can read more about automatic table re-syncs from Fivetran's Documentation.