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Updating the Next Rec ID Sequence in Dynamics AX

By Nicole Gentz | June 26, 2017

Recently I had to create database records outside of Dynamics AX. I used SQL to move some records from ISV tables to new standard tables within AX. There was a ton of data, so it was much faster to insert these records using SQL. Initially, I overlooked one important factor. When I created these records outside of the AX environment, the SystemSequences table was not updated.

The SystemSequences table stores the next RecID by table in the AX environment: https://msdn.microsoft.com/en-us/library/systemsequences.aspx
If this table is not updated properly, the users will see duplicate record errors that may not make sense to you. The users had sent me this error below. When I looked at the data, the Load ID did not exist. It didn’t throw an error about Rec IDs, so it’s a bit misleading.

RecIDSequence_Nicole

The issue was that I had created records in the WHSLoadTable outside of AX.  The SystemSequences table wasn’t updated, so the next value of the Rec ID was incorrect and throwing an error. In this situation, you must update the SystemSequences table. You’ll need to find the max value for the table and update to the max value + 1.

Here is a portion of the SQL used to fix this issue:

DECLARE @MaxRecID BIGINT
 	DECLARE @NextVal BIGINT

SELECT @MaxRecID = MAX(RECID)
FROM WHSLoadTable

SELECT @NextVal = NEXTVAL
	FROM SYSTEMSEQUENCES
	INNER JOIN SQLDICTIONARY
	ON SQLDICTIONARY.FIELDID = 0
	AND SQLDICTIONARY.name = 'WHSLoadTable'
	AND SQLDICTIONARY.TABLEID = SYSTEMSEQUENCES.TABID

	IF (@NextVal > @MaxRecID) 
	BEGIN
		PRINT 'WHSLoadTable did not need to be updated.'
	END
	ELSE 
	BEGIN
PRINT 'Updated WHSLoadTable from ' + CONVERT(VARCHAR(MAX), @NextVal) + '' to '' + CONVERT(VARCHAR(MAX), @MaxRecID + 1)
			
		UPDATE SYSTEMSEQUENCES
		SET NEXTVAL = @MaxRecID + 1
		FROM SYSTEMSEQUENCES
		INNER JOIN SQLDICTIONARY
		ON SQLDICTIONARY.FIELDID = 0
		AND SQLDICTIONARY.name = 'WHSLoadTable'
		AND SQLDICTIONARY.TABLEID = SYSTEMSEQUENCES.TABID
END

I hope this helps you out!

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