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    <p>By design, your table <code>[cresql].[dbo].[AR_Transactions]</code> is supposed to hold only one value for the primary key - in your case, this seems to be a combination of columns that make up this PK.</p> <p>This is not a SQL issue, but seems to be a design concept.</p> <p>You should find out what combination of keys is making up your primary key - it may be that the design states that you can insert once and update later on for that combination (although I would not consider this to be good design).</p> <p><strong>EDIT</strong></p> <p>Since Trans_Id is the PK, and you are not using that column in your insert, it is either being inserted as IDENTITY, as a DEFAULT (brrrrr), or using a TRIGGER.</p> <p><strong>IDENTITY:</strong> Check to see if the IDENTITY specification is screwed up. If so, just reset it. Here is how to <a href="https://stackoverflow.com/questions/147210/how-can-i-reseed-an-identity-column-in-a-t-sql-table-variable">How can I reseed an identity column in a T-SQL table variable?</a></p> <p><strong>DEFAULT:</strong> Go find whoever designed the table and ask them</p> <p><strong>TRIGGER:</strong> Find the trigger and read through the code to see what it is doing. Here is how to find a list of triggers <a href="https://stackoverflow.com/questions/636452/what-is-the-best-way-to-check-whether-a-trigger-exists-in-sql-server">What is the most portable way to check whether a trigger exists in SQL Server?</a></p> <p><strong>Alternate scenario:</strong></p> <p>There could be a trigger that inserts into an AUDIT table that may have the problem. Check if the table has any other triggers and see what they do.</p>
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    1. POViolation of PRIMARY KEY constraint error SQL
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    1. USCommunity
    1. USRaj More
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    1. COhow do i find out what they are
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      1. USMatt Elhotiby
    2. CO@Tamer: you decide which field(s) is/are primary key... so you should (must) know when you designed your db...
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    3. CO@Marco: someone else could have designed the table.
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