Pocket 2 and/or Osmo Action - can I rename recorded image 'DJI' prefix?

I am using both a Pocket 2 and Osmo action for the same video project which I am putting together in Adobe Premiere. To aid raw footage file management from the DJIs, I would like to change the 'DJI' file naming prefix on at least one of the devices.

For my project, I am using a third camera, a Nikon DSLR, and the Nikon allows you to change the file name prefix.

However, I looked in both DJI devices onboard settings and can't find a way. When I connected each device separately in the DJI Mimo app, I couldn't see a way there either - is there?