The Dev org for our Managed Package Spring '16 upgrade is scheduled to be done tomorrow (Feb 6). We have an Extension Package org and several customer orgs related that are not going to be upgraded until Feb 13th.
From what I understand during that time period we will not be able to install major releases for our customer (or into the extension org) because it will be a Spring '16 release attempting to be installed on a Winter '16 org.
Does the same apply for patches? If the customer finds a critical defect during the blackout period am I also disallowed from patching anything from our package dev org to them?
Any insight you could provide would be greatly appreciated