cubicweb-collaboration #3670236 Allow for migrating non-collaborative cloned containers to collaborative ones [rejected]

This involves allowing to set the frozen attribute on containers which had been cloned in a non-collaborative context.

This is useful when migrating a database with non-collaborative containers, to collaborative ones.

prioritynormal
typeenhancement
done in<not specified>
load0.000
load left0.000
closed by<not specified>
patch[hooks] Allow to set frozen on containers previously cloned in non-collaborative contexts (closes #3670236). [rejected][hooks] Allow to set frozen on containers previously cloned in non-collaborative contexts (closes #3670236). [rejected]