Thread:Project:Support desk/Upgrade issue/reply

Thread:Project:Support_desk/upgrade_configuration_problem_on_mediawiki_1.17.3 someone had a similar problem - however: Without a solution.

I guess that the updater does not do the necessary steps in the correct order so that the constraint cannot be changed properly.

As a workaround you could try doing the update in several steps: Do not go from 1.12 to 1.23 directly, but first to e.g. 1.17, when that did not work go to e.g. 1.15 in a first step and so on; when it did work go to 1.19 and so on. Remember that after a failed update you will have to replace your database with a backup - so do not forget to make some during these steps!