使用Groups模型，ManyToMany字段在django中循环不良

I want to display 1 button in the for-loop, but i get as many buttons as many i have created groups. So.. when i created 3 groups where i'm one of the members, i got 3 buttons under every group i have. The problem is with this first loop in my code, but i don't know how to solve this.I want to display 1 button in the for-loop, but