This tag is for questions about how rejected migrations work and what causes questions to be rejected for migration.
Excerpt from What is migration and how does it work?
What causes a migration to be rejected and what happens after?
A migration can be automatically rejected before it even gets migrated if any of the following conditions apply:
- The user is question-banned or suspended on the destination site.
- The question does not contain any tags that exist on the destination site (and the destination site isn't a meta site).
- The question is an exact duplicate of another question on the destination site.
A question can also be rejected by the target community after it has already been migrated if it gets closed as a reason other than duplicate, or gets deleted (usually by the owner) on the target site. When a question which was already migrated gets rejected, the entire process of the migration is reversed. All the answers are returned to the origin site and undeleted* and are subsequently deleted on the target site.
*Note: If the question was already deleted on the origin site, migration rejection does not cause the question to be undeleted.