Cannot edit this cell.
SQL Server 2005
The cell you've selected cannot be edited. There are many possible causes, including:
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The field is the result of a computed expression.
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The field is a literal.
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The field is part of a read-only joined table.
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The field has a precision greater than 29.
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You do not have update permission.
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The recordset itself cannot be updated.
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Previously run triggers or updates may prevent getting the current value.
For more information, see Modifying Columns (Visual Database Tools).