deleting the last manager of a space results in space that cannot be managed

[individual-it]

Describe the bug

When the last user is deleted who has the permission "can manage" of a space, the space cannot be managed by anyone and no new user can receive that permission

Steps to reproduce

Steps to reproduce the behavior:

1. as admin create two users "brian" & "carol"
2. make "brian" space-admin
3. as brian create a space called "finance" and one called "management"
4. as brian add carol to the space "finance" with the permissions "can view"
5. as brian add carol to the space "management" with the permissions "can manage"
6. as carol check that you have access to both spaces
7. as admin delete the user "brian"
8. as admin check the spaces in the "administration" settings

Expected behavior

1. the deleted user should not be included in the count of users in the space list
2. the deleted users should not be shown anymore in the space list
3. there should be some way to add a new space-admin to the space

Actual behavior

1. after deleting of "brian" both shares still are shown to have 2 users and show one ghost-user
   
   
   
2. there is no way to add a new manager of that space after the last one is deleted

{
	"value": [
		{
			"driveAlias": "project/finance",
			"driveType": "project",
			"id": "c58e0760-0fe2-4255-bfab-52799020c0cb$20d2e739-1ad4-4785-9e72-9891f9cec499",
			"lastModifiedDateTime": "2023-06-02T11:46:55.932096014+05:45",
			"name": "finance",
			"owner": {
				"user": {
					"displayName": "",
					"id": "20d2e739-1ad4-4785-9e72-9891f9cec499"
				}
			},
			"quota": {
				"remaining": 999999954,
				"state": "normal",
				"total": 1000000000,
				"used": 46
			},
			"root": {
				"eTag": "\"102944b089b54328bbf37d7dc472ffdf\"",
				"id": "c58e0760-0fe2-4255-bfab-52799020c0cb$20d2e739-1ad4-4785-9e72-9891f9cec499",
				"permissions": [
					{
						"grantedToIdentities": [
							{
								"user": {
									"displayName": "",
									"id": "7ec9a663-d5f1-4a03-83a5-5166e71dd7d3"
								}
							}
						],
						"roles": [
							"manager"
						]
					},
					{
						"grantedToIdentities": [
							{
								"user": {
									"displayName": "",
									"id": "c969056d-a4f2-4343-b13d-ad4e87e643ef"
								}
							}
						],
						"roles": [
							"viewer"
						]
					}
				],
				"webDavUrl": "https://192.168.0.25:9200/dav/spaces/c58e0760-0fe2-4255-bfab-52799020c0cb$20d2e739-1ad4-4785-9e72-9891f9cec499"
			},
			"webUrl": "https://192.168.0.25:9200/f/c58e0760-0fe2-4255-bfab-52799020c0cb$20d2e739-1ad4-4785-9e72-9891f9cec499"
		},
		{
			"driveAlias": "project/management",
			"driveType": "project",
			"id": "c58e0760-0fe2-4255-bfab-52799020c0cb$2320ec0b-4da9-4fe6-810f-88c97a13b0aa",
			"lastModifiedDateTime": "2023-06-02T11:47:36.561399967+05:45",
			"name": "management",
			"owner": {
				"user": {
					"displayName": "",
					"id": "2320ec0b-4da9-4fe6-810f-88c97a13b0aa"
				}
			},
			"quota": {
				"remaining": 999999954,
				"state": "normal",
				"total": 1000000000,
				"used": 46
			},
			"root": {
				"eTag": "\"f7518e5aa5d25a681d53e06a200fed9d\"",
				"id": "c58e0760-0fe2-4255-bfab-52799020c0cb$2320ec0b-4da9-4fe6-810f-88c97a13b0aa",
				"permissions": [
					{
						"grantedToIdentities": [
							{
								"user": {
									"displayName": "",
									"id": "7ec9a663-d5f1-4a03-83a5-5166e71dd7d3"
								}
							}
						],
						"roles": [
							"manager"
						]
					},
					{
						"grantedToIdentities": [
							{
								"user": {
									"displayName": "",
									"id": "c969056d-a4f2-4343-b13d-ad4e87e643ef"
								}
							}
						],
						"roles": [
							"manager"
						]
					}
				],
				"webDavUrl": "https://192.168.0.25:9200/dav/spaces/c58e0760-0fe2-4255-bfab-52799020c0cb$2320ec0b-4da9-4fe6-810f-88c97a13b0aa"
			},
			"webUrl": "https://192.168.0.25:9200/f/c58e0760-0fe2-4255-bfab-52799020c0cb$2320ec0b-4da9-4fe6-810f-88c97a13b0aa"
		}
	]
}

Setup

Please describe how you started the server and provide a list of relevant environment variables or configuration files.

OCIS_URL=https://192.168.0.25:9200 ~/Downloads/ocis-3.0.0-rc.4-linux-amd64 server

[micbar]

known issue, see #5967

[individual-it]

@micbar what about the fact that the deleted user is still shown in the permissions and also "shown" in the UI as an empty avatar or empty string?

[micbar]

also known and accepted :-)