INSTALLING HACKINTOSH ON EXTERNAL DRIVE DOESN'T GIVE APFS

hey, i was downloading Niresh Catalina on my laptop (external hdd), everything was going smooth until i noticed, in disk utility, i couldn't "erase" the partition with APFS Format. I researched online and it said it's because the drive "scheme" is not GUID PARTITION MAP. I dont want to erase my 1tb external hdd, how do i fix it?

submitted by /u/v2ube
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