diff --git a/web/src/admin/groups/GroupForm.ts b/web/src/admin/groups/GroupForm.ts
index 5a4024512..9ceb6c6cc 100644
--- a/web/src/admin/groups/GroupForm.ts
+++ b/web/src/admin/groups/GroupForm.ts
@@ -51,7 +51,7 @@ export class GroupForm extends ModelForm<Group, string> {
                 patchedGroupRequest: data,
             });
         } else {
-            data.users = Array.from(this.instance?.users || []);
+            data.users = [];
             return new CoreApi(DEFAULT_CONFIG).coreGroupsCreate({
                 groupRequest: data,
             });
diff --git a/web/src/admin/users/UserForm.ts b/web/src/admin/users/UserForm.ts
index 7ead930b7..ec657cfa4 100644
--- a/web/src/admin/users/UserForm.ts
+++ b/web/src/admin/users/UserForm.ts
@@ -48,6 +48,7 @@ export class UserForm extends ModelForm<User, number> {
                 patchedUserRequest: data,
             });
         } else {
+            data.groups = [];
             return new CoreApi(DEFAULT_CONFIG).coreUsersCreate({
                 userRequest: data,
             });