[15.0-RELEASE-p1] pkg upgrade stays in loop

I ran "pkg update" then "pkg upgrade", but this one stays in loop:

Code:
root@freebsd:~ # pkg upgrade
Updating FreeBSD-ports repository catalogue...
FreeBSD-ports repository is up to date.
Updating FreeBSD-ports-kmods repository catalogue...
FreeBSD-ports-kmods repository is up to date.
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
New version of pkg detected; it needs to be installed first.
Checking integrity... done (0 conflicting)
Your packages are up to date.
Updating FreeBSD-ports repository catalogue...
FreeBSD-ports repository is up to date.
Updating FreeBSD-ports-kmods repository catalogue...
FreeBSD-ports-kmods repository is up to date.
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
New version of pkg detected; it needs to be installed first.
Checking integrity... done (0 conflicting)
Your packages are up to date.
Updating FreeBSD-ports repository catalogue...
FreeBSD-ports repository is up to date.
Updating FreeBSD-ports-kmods repository catalogue...
FreeBSD-ports-kmods repository is up to date.
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
New version of pkg detected; it needs to be installed first.
Checking integrity... done (0 conflicting)
Your packages are up to date.
Updating FreeBSD-ports repository catalogue...
FreeBSD-ports repository is up to date.
Updating FreeBSD-ports-kmods repository catalogue...
FreeBSD-ports-kmods repository is up to date.
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
New version of pkg detected; it needs to be installed first.
Checking integrity... done (0 conflicting)
Your packages are up to date.
Updating FreeBSD-ports repository catalogue...
FreeBSD-ports repository is up to date.
Updating FreeBSD-ports-kmods repository catalogue...
FreeBSD-ports-kmods repository is up to date.
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
New version of pkg detected; it needs to be installed first.
Checking integrity... done (0 conflicting)
Your packages are up to date.
Updating FreeBSD-ports repository catalogue...
FreeBSD-ports repository is up to date.
Updating FreeBSD-ports-kmods repository catalogue...
FreeBSD-ports-kmods repository is up to date.
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
New version of pkg detected; it needs to be installed first.
Checking integrity... done (0 conflicting)
Your packages are up to date.
Updating FreeBSD-ports repository catalogue...
^C
root@freebsd:~ # freebsd-version 
15.0-RELEASE-p1

FreeBSD is running inside Virtualbox, in case it's related.
 
Fixed it:

Code:
root@freebsd:~ # freebsd-version 
15.0-RELEASE-p1
root@freebsd:~ # pkg -v
2.4.2
root@freebsd:~ # pkg rquery '%v' pkg
2.5.1
2.5.1
root@freebsd:~ # pkg bootstrap -f
The package management tool is not yet installed on your system.
Do you want to fetch and install it now? [y/N]: y
Bootstrapping pkg from pkg+https://pkg.FreeBSD.org/FreeBSD:15:amd64/quarterly, please wait...
Verifying signature with trusted certificate pkg.freebsd.org.2013102301... done
Installing pkg-2.5.1...
package pkg is already installed, forced install
Extracting pkg-2.5.1: 100%
root@freebsd:~ # pkg upgrade
Updating FreeBSD-ports repository catalogue...
FreeBSD-ports repository is up to date.
Updating FreeBSD-ports-kmods repository catalogue...
FreeBSD-ports-kmods repository is up to date.
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
Updating database digests format: 100%
Checking for upgrades (166 candidates): 100%
Processing candidates (166 candidates): 100%
The following 195 package(s) will be affected (of 0 checked):
[...]
 
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