Remove not null column constraints
Remove not null column constraints

tananaev/traccar,ninioe/traccar,tananaev/traccar,jssenyange/traccar,renaudallard/traccar,orcoliver/traccar,jssenyange/traccar,al3x1s/traccar,al3x1s/traccar,tananaev/traccar,joseant/traccar-1,joseant/traccar-1,AnshulJain1985/Roadcast-Tracker,5of9/traccar,tsmgeek/traccar,renaudallard/traccar,orcoliver/traccar,ninioe/traccar,vipien/traccar,orcoliver/traccar,stalien/traccar_test,tsmgeek/traccar,vipien/traccar,jssenyange/traccar,duke2906/traccar,AnshulJain1985/Roadcast-Tracker,duke2906/traccar,ninioe/traccar,jon-stumpf/traccar,jon-stumpf/traccar,tsmgeek/traccar,stalien/traccar_test,5of9/traccar,jon-stumpf/traccar