errors while building projact

i started making a simple mod like galacticraft.

when i try to build it tells me these errors, both of them twice:

/home/user/MCreatorWorkspaces/space_craft/src/main/java/net/mcreator/spacecraft/client/model/Modeltier_1_rocket.java:25: error: variable hexadecagon is already defined in class Modeltier_1_rocket

/home/user/MCreatorWorkspaces/space_craft/src/main/java/net/mcreator/spacecraft/client/model/Modeltier_1_rocket.java:85: error: variable hexadecagon is already defined in method createBodyLayer() 

please help

here is a shareable .zip 

https://sendanywhe.re/U58R9VL6