bugfix for #1098 (assigning a group to a user, the group appears incrementally many times the more you assign it)
bugfix for #1098 (assigning a group to a user, the group appears incrementally many times the more you assign it)

jbicha/server,lrytz/core,jbicha/server,nextcloud/server,bluelml/core,sharidas/core,bluelml/core,andreas-p/nextcloud-server,nextcloud/server,xx621998xx/server,xx621998xx/server,endsguy/server,xx621998xx/server,phil-davis/core,Ardinis/server,andreas-p/nextcloud-server,whitekiba/server,IljaN/core,michaelletzgus/nextcloud-server,Ardinis/server,lrytz/core,pixelipo/server,pixelipo/server,pmattern/server,pollopolea/core,nextcloud/server,bluelml/core,pixelipo/server,endsguy/server,cernbox/core,cernbox/core,owncloud/core,owncloud/core,pollopolea/core,IljaN/core,pixelipo/server,cernbox/core,xx621998xx/server,sharidas/core,IljaN/core,endsguy/server,xx621998xx/server,Ardinis/server,cernbox/core,lrytz/core,owncloud/core,jbicha/server,pmattern/server,whitekiba/server,pollopolea/core,michaelletzgus/nextcloud-server,cernbox/core,endsguy/server,lrytz/core,pollopolea/core,pmattern/server,pmattern/server,endsguy/server,andreas-p/nextcloud-server,IljaN/core,pmattern/server,nextcloud/server,lrytz/core,jbicha/server,andreas-p/nextcloud-server,whitekiba/server,bluelml/core,michaelletzgus/nextcloud-server,IljaN/core,owncloud/core,Ardinis/server,bluelml/core,whitekiba/server,jbicha/server,whitekiba/server,sharidas/core,andreas-p/nextcloud-server,pixelipo/server,Ardinis/server,sharidas/core,michaelletzgus/nextcloud-server,pollopolea/core,owncloud/core,sharidas/core