Fix bug where linked Community/Collection info was sometimes listed many times in a row

(cherry picked from commit 229236634a)

src/app/access-control/group-registry/group-form/group-form.component.ts

@@ -230,12 +230,14 @@ export class GroupFormComponent implements OnInit, OnDestroy {
             this.groupBeingEdited = activeGroup;
 
             if (linkedObject?.name) {
+              if (!this.formGroup.controls.groupCommunity) {
                 this.formBuilderService.insertFormGroupControl(1, this.formGroup, this.formModel, this.groupCommunity);
                 this.formGroup.patchValue({
                   groupName: activeGroup.name,
                   groupCommunity: linkedObject?.name ?? '',
                   groupDescription: activeGroup.firstMetadataValue('dc.description'),
                 });
+              }
             } else {
               this.formModel = [
                 this.groupName,