Rename Primary Key

Hi All,

I am trying to rename a primary key field of a table, and am running into problems. Please advice.

Scenario
I am currently working on the Default Navision Job Master table. (Jobs : 167). The client requires to auto generate the number series for the Job based on certain conditions. The conditions are
a. Job Type (Could Be Any Thing)
b. Job Level (Boolean corresponds to Parent - Child).

Please refer the Fig00101 below for more information on the field placings.


I have also created a separate table, where the Job Type - Job Level - Number Series combination would be captured. Please refer Fig00102.


Now based on the user input in these two fields, I would want to create a new number for the Job. Since Navision creates the number when the user presses F3, I would have to replace that number and show custom generated number in the field. I have written the following code to achieve that.

// Get - Set The Number Based On Job Type
IF "Job Type" = '' THEN
BEGIN
  ERROR('Please select a Job Type to proceed.');
  EXIT;
END
ELSE
BEGIN
  IF NVJobMstr.GET("Job Type") = TRUE THEN
  BEGIN
    // Check Which No. Series To Get
    IF "Is Child" = TRUE THEN
    BEGIN
      // Get The Next Number Using Child Number Series
      sDocNo := NoSeriesMgt.GetNextNo(NVJobMstr."Child No. Series",0D,TRUE);
    END
    ELSE
    BEGIN
      // Get The Next Number Using Child Number Series
      sDocNo := NoSeriesMgt.GetNextNo(NVJobMstr."Parent No. Series",0D,TRUE);
    END;
  END
  ELSE
  BEGIN
    ERROR('A Get operation on table NV Job Type Master failed accessing data.');
    EXIT;
  END;
END;

// Delete Old Record From Table
IF DELETE(TRUE) = FALSE THEN
BEGIN
  ERROR('A Delete operation on table Jobs failed accessing data.');
END;

// Insert New Data Into Table
"No." := sDocNo;
IF INSERT(TRUE) = FALSE THEN
BEGIN
  ERROR('An Insert operation on table Jobs failed accessing data.');
END;
  
// Reset The Current Record
RESET;

Problem
Everything works fine. But when I try to close the window, I get a warning message saying "Rename Record ?". Please refer Fig00103.


Throughout my code, I have not used the RENAME keyword. And I looked into MIBUSO forums from where I figured out that it is better to DELETE + INSERT than to RENAME.
http://www.mibuso.com/forum/viewtopic.php?f=14&t=16743&hilit=Rename+REcord

Please do let me know how to overcome this problem. Thanks in advance for all the help.