There is a troublemaking empty file (md5sums of kernel 4.19.1) left 
on my ubuntu system, with has strange owner/group/date/attributes

How to fix or workaround this defect file?

```
$ uname -a
Linux olly-ryzen-pc1 4.20.10-042010-generic #201902150516 SMP Fri 
Feb 15 10:19:07 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

```

**stat**

```
$ stat /var/lib/dpkg/info/linux-image-unsigned-4.19.1-041901-generic.md5sums 
  Datei: /var/lib/dpkg/info/linux-image-unsigned-4.19.1-041901-generic.md5sums 
  Größe: 0             Blöcke: 0          EA Block: 4096   Normale 
leere Datei <= empty file
Gerät: 802h/2050d    Inode: 27918873    Verknüpfungen: 1 
Zugriff: (5625/-rwS-w-r-t)  Uid: (477987903/ UNKNOWN)   Gid: (3699747887/ 
UNKNOWN) 
Zugriff    : 2381-05-02 11:29:39.163881368 +0100 
Modifiziert: 2293-06-01 00:54:46.455862499 +0100 
Geändert   : 2167-05-10 21:19:01.867729249 +0100 
 Geburt    : - 

```

**lsattr**

```
$ lsattr /var/lib/dpkg/info/linux-image-unsigned-4.19.1-041901-generic.md5sums
lsattr: Keine Daten verfügbar Beim Lesen der Flags von /var/lib/dpkg/info/linux-image-unsigned-4.19.1-041901-generic.md5sums

```

**apt, dpkg**

This file can't changed or deleted (remove/purge 4.19.1), but 
troubles apt-get to install applications.

--fix-broken or --reinstall dpkg exit also with 'not allowed' message.

Cannot be deleted.
Die Control-Info-Datei »/var/lib/dpkg/info/linux-image-unsigned-4.
19.1-041901-generic.md5sums« kann nicht gelöscht werden: Vorgang 
nicht zulässig

**chmod -st, chown root:root**

No changes.

**rm -f**

No.

**live USB**

Also tried a boot of ubuntu (install 4.18) from USB-Stick to repair, but:

`sudo e2fsck -f /dev/sba2` does not report an error

`sudo badblocks -vsn /dev/sda2` reports 0 bad blocks

and `rm`, `chmod`, `chown`: same behaivior as above ..

Only to compare, here is a neighbor file: 

```
$ stat /var/lib/dpkg/info/linux-sound-base.md5sums 
  Datei: /var/lib/dpkg/info/linux-sound-base.md5sums 
  Größe: 545           Blöcke: 8          EA Block: 4096   Normale Datei 
Gerät: 802h/2050d    Inode: 27269131    Verknüpfungen: 1 
Zugriff: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root) 
Zugriff    : 2019-02-03 16:56:08.943545720 +0100 
Modifiziert: 2015-07-31 05:42:23.000000000 +0200 
Geändert   : 2018-05-22 01:20:37.178864616 +0200 
 Geburt    : - 

$ lsattr /var/lib/dpkg/info/linux-image-unsigned-4.19.1-041901-generic.list
--------------e--- 
/var/lib/dpkg/info/linux-image-unsigned-4.19.1-041901-generic.list

```