Failing to edit extension

Just got notified of the following and upgraded.

fw_ari (current:
framework 2.9.0rc1.2 (current: 2.9.0rc1.1)
core 2.9.0rc1.2 (current: 2.9.0rc1.1)

Now I can no longer edit extensions. I get the following error
"Extension number conflict, please choose another"

I suspect there is something wrong with

I see now someone else reported the same bug in the general forum.
Apologies for the duplicate (I had only looked in the Beta forum)

As per subject r11980 fixes this.

pull down the new core module, this was fixed earlier this morning and sorry that obvious test condition was missed prior to publishing.

Thanks Philippe,

No need to apologise.

Appreciate the quick response and fix.