renumber primary key

SET IDENTITY INSERT [MyTable] ON

SET IDENTITY INSERT [MyTable] OFF

SELECT Field1, Field2 INTO #MyTable FROM MyTable

TRUNCATE TABLE MyTable

INSERT INTO MyTable
(Field1, Field2)
SELECT Field1, Field2 FROM #MyTable

SELECT * FROM MyTable
-----------------------------------
ID    Field1    Field2
1     Value1    Value2

-- Reset the primary key counter
dbcc checkident(ErrorCode, reseed, 7000)

-- Move all rows greater than 8000 to the 7000 range
insert into ErrorCode
select Description from ErrorCode where ErrorCodeID >= 8000

-- Delete the old rows
delete ErrorCode where ErrorCodeID >= 8000

-- Reset the primary key counter
dbcc checkident(ErrorCode, reseed, 8000)