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SQL 2005 Primary Key Error

Last Modified: 2010-05-18
I have a table, t_Month, that I needed to refresh with data from our development box.  The primary key on this table is Month_ID so I removed the key, re-imported the data, and then tried to add the key back on.  When I try to save the table I get the following error:

't_Month' table
- Unable to create index 'PK_t_Month'.  
CREATE UNIQUE INDEX terminated because a duplicate key was found for object name 'dbo.t_Month' and index name 'PK_t_Month'.  The duplicate key value is (1).
Could not create constraint. See previous errors.
The statement has been terminated.

I can't find another index called PK_t_Month anywhere.  Not really sure what to do here, even went so far as to bounce the server on the chance that the key was stuck in memory somewhere.  

Thanks in advance,

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The pk_t_month index is in the dbo.t_month table.
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AneeshDatabase Consultant
Top Expert 2009

> can't find another index called PK_t_Month anywhere
It is not the problem with the existance of another index, it is the problem with the data, your column contain some duplicate values, that is why it is failing, you can create it by skinpping the existing data (there is an option )



Good call, for whatever reason it never occurred to me to check the actual data.  I must not have it "delete existing values" on the import.

Thanks for the suggestion,


As aneeshattingal and crag point out, look at your data. You have duplicate values in the primary key. That is not allowed.

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