Everything is 0 but should have only the ID of the armor and the helmet, then you will get the armor and helmet.
Just specify that, you change the image you want to change from this armor, this helmet, the image will change according to your choice.
If there are other parts that you set overlapping, it may cause the image used to always work in the next sequence.
So I tested this plugin in all forms, it is possible that you have set it up wrong.
In the sample project, the sequence is overlapping and difficult to understand easily. You should do it from the beginning.