| ⇢ | B | AbstractPrincipalBackend added | |
| ⇢ | B | UpdateCalendarResourcesRoomsBackgroundJob added | |
| ⇢ | A | ResourcePrincipalBackend added | |
| ⇢ | A | RoomPrincipalBackend added | |
| ⇢ | A | Version1005Date20180530124431 added | |
| ⇢ | A | Manager added | |
| ⇢ | A | Manager added | |
| B | ↘ | C | RootCollection got worse |