Error 3604
Severity Level 10
Message Text
Duplicate key was ignored.
Explanation
This error occurs when you attempt to insert a row that has an index value that violates the uniqueness property (UNIQUE with IGNORE_DUP_KEY) on an existing index.
Microsoft® SQL Server™ ignores the statement that caused the error and continues processing the transaction.
Action
No action is necessary unless you want to insert that row into the table. If so, you can drop and re-create the index without the UNIQUE clause, or you can change the data causing the uniqueness violation.