partitioning - How to renumber a partition?

I used to have a primary partition, /dev/sdb1, and an extended partition, /dev/sdb2. Since I deleted sdb1 and merged it into sdb2, I’ve been trying to think of a way to modify the id '/dev/sdb2' to '/dev/sdb1' (beacuse there won’t be /dev/sdb1 anymore).

There’s also two logical partitions inside /dev/sdb2: /dev/sdb5 and /dev/sdb6.

Is there an easy way to modify the numeric id?

My partition table looks like this:

Device Boot     Start        End     Blocks  Id  System
----------------------------------------------------------------
/dev/sdb2        2048  234440703  117219328   f  W95 Ext’d (LBA)
/dev/sdb5       16065   87249014   43616475   7  HPFS/NTFS/exFAT
/dev/sdb6    87251063  234440703  73594820+   7  HPFS/NTFS/exFAT
Nr  AF  Hd  Sec  Cly   Hd  Sec   Cly  Start       Size  ID
----------------------------------------------------------
 1  00   0    0    0    0    0     0      0          0  00
 2  00  32   33    0  254   63  1023   2048  234438656  0f
 3  00   0    0    0    0    0     0      0          0  00
 4  00   0    0    0    0    0     0      0          0  00
 5  00   0    1    1  254   63  1023  14017   87232950  07
 6  00  32   33  311  254   63  1023   2048  147189641  07

Answer

Delete the partitions, and recreate them in exactly the same positions. Make sure you are using sectors as the unit to avoid rounding errors.