package manager failed with update from snv_129 to snv_130

I had my pkg publishers as followed:
dev                   http://pkg.opensolaris.org/dev/   
opensolaris.org  http://pkg.opensolaris.org/release/

But this just results in pkg refresh failing:
-To correct the repository origin, execute the following command as a privileged user:

pkg set-publisher -O opensolaris-dev

To add a new publisher using this publisher's repository origin, execute the following command as a privileged user:

pkg set-publisher -O http://pkg.opensolaris.org/dev/

After the new publisher has been added, this one should be removed by executing the following command as a privileged user:

pkg unset-publisher opensolaris-dev

I tried to follow the suggestions but to no avail.
Then I read it was mentioned to have only 1 publisher opensolaris.org as Preferred and delete dev resulting in the following pkg publisher:
opensolaris.org   http://pkg.opensolaris.org/dev/ 

But still the package manager failed to upgrade to 130 as did pkg refresh
In the forum (http://www.pubbs.net/opensolaris/200912/32545/) it was mentioned to use "pkg image-update -f"  due to errors related to release snv-128 and 129 (Option -f bypasses SUNWipkg)

Update succeeded to 130.