Can't change CreateDate<FileModifyDate for 3GPP files?

[theprof]

I have a 3GPP video file with the following dates:

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[System]        FileModifyDate                  : 2013:06:02 15:17:20-04:00
[System]        FileAccessDate                  : 2024:10:20 10:39:51-04:00
[System]        FileInodeChangeDate             : 2024:10:20 10:39:53-04:00
[QuickTime]     CreateDate                      : 1903:12:31 19:00:00-05:00
[QuickTime]     ModifyDate                      : 1903:12:31 19:00:00-05:00
[Track1]        TrackCreateDate                 : 1903:12:31 19:00:00-05:00
[Track1]        TrackModifyDate                 : 1903:12:31 19:00:00-05:00
[Track1]        MediaCreateDate                 : 1903:12:31 19:00:00-05:00
[Track1]        MediaModifyDate                 : 1903:12:31 19:00:00-05:00
[Track2]        TrackCreateDate                 : 1903:12:31 19:00:00-05:00
[Track2]        TrackModifyDate                 : 1903:12:31 19:00:00-05:00
[Track2]        MediaCreateDate                 : 1903:12:31 19:00:00-05:00
[Track2]        MediaModifyDate                 : 1903:12:31 19:00:00-05:00
I'm trying to set the "Create Date" from the "FileModifyDate" because this file does not seem to have a CreateDate. When I use the below command, it says: No file specified

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exiftool \
-overwrite_original \
-if '$MimeType=~/^video\//i' \
-if '(not defined $CreateDate or $CreateDate le "1970:12:31 23:59:59")' \
-api QuickTimeUTC \
'-createdate<filemodifydate'
"$DIR"

[theprof]

Nevermind, I forgot the backslash before the $DIR line.