diff --git a/backend/src/graphql/arg/CheckUsernameArgs.ts b/backend/src/graphql/arg/CheckUsernameArgs.ts
index 6aaed6d0b..64265b64e 100644
--- a/backend/src/graphql/arg/CheckUsernameArgs.ts
+++ b/backend/src/graphql/arg/CheckUsernameArgs.ts
@@ -4,7 +4,4 @@ import { ArgsType, Field } from 'type-graphql'
 export default class CheckUsernameArgs {
   @Field(() => String)
   username: string
-
-  @Field(() => Number, { nullable: true })
-  groupId?: number
 }