insert overwrites existing JFIF data

[Dobatymo]

Adding a exif orientation flag using insert removes JFIF information.

This

[ExifTool]      ExifTool Version Number         : 12.24
[File]          File Name                       : ...
[File]          Directory                       : ...
[File]          File Size                       : ...
[File]          File Modification Date/Time     : ...
[File]          File Access Date/Time           : ...
[File]          File Creation Date/Time         : ...
[File]          File Permissions                : -rw-rw-rw-
[File]          File Type                       : JPEG
[File]          File Type Extension             : jpg
[File]          MIME Type                       : image/jpeg
[File]          Image Width                     : 1700
[File]          Image Height                    : 2338
[File]          Encoding Process                : Baseline DCT, Huffman coding
[File]          Bits Per Sample                 : 8
[File]          Color Components                : 3
[File]          Y Cb Cr Sub Sampling            : YCbCr4:2:0 (2 2)
[JFIF]          JFIF Version                    : 1.01
[JFIF]          Resolution Unit                 : inches
[JFIF]          X Resolution                    : 200
[JFIF]          Y Resolution                    : 200

becomes

[ExifTool]      ExifTool Version Number         : 12.24
[File]          File Name                       : ...
[File]          Directory                       : ...
[File]          File Size                       : ...
[File]          File Modification Date/Time     : ...
[File]          File Access Date/Time           : ...
[File]          File Creation Date/Time         : ...
[File]          File Permissions                : -rw-rw-rw-
[File]          File Type                       : JPEG
[File]          File Type Extension             : jpg
[File]          MIME Type                       : image/jpeg
[File]          Exif Byte Order                 : Big-endian (Motorola, MM)
[File]          Image Width                     : 1700
[File]          Image Height                    : 2338
[File]          Encoding Process                : Baseline DCT, Huffman coding
[File]          Bits Per Sample                 : 8
[File]          Color Components                : 3
[File]          Y Cb Cr Sub Sampling            : YCbCr4:2:0 (2 2)
[EXIF]          Orientation                     : Rotate 270 CW