Use GA037
Select a plantin list
Click Edit button
Get to screen GA100S36
Click Edit Profile button
Takes you to the edit screen GA100S02, where you make your changes
In screen GA100S02
Since you put the cultivar name in where the Species should be you have to:
Click Work with Species button
In screen GA100S05, select N/A (Not applicable)
Thats probably the bit where you got stuck ?
On return to GA100S02, you'll find the species field has been blanked out
Now enter your cultivar name in the correct field.
Click Save Changes
More info
First time around, when you put the cultivar name in the species field, you created a species record with the name of the cultivar.
After you click the Save Changes button above, the program will ask if you wish to delte the unused species
There is only ONE screen in the system for editing (GA100S02).
When you click that Save Changes button theres pages and pages of programming code executed (especially if you delete a plant)
As a "Challenge", do it all again exactly as before, with another "imaginary" plant and see how it works.
Then delete it.
Perhaps other members will have a go at that as well.
Let me know if that explained OK Eric