Description
Opening a 2.6 DB with 2.4 creates a unique index on the admin.system.users collection that prevents adding multiple users with the same name to different DBs when reopening in 2.6.
{ "v" : 1, "key" : { "user" : 1, "userSource" : 1 }, "unique" : true, "ns" : "admin.system.users", "name" : "user_1_userSource_1" }
|
This could be fixed by automatically deleting such an index if the user doc version is >= 3.