# migration_version	application_rollback_policy	reason
20260722110837	forward_only	hidden requests can store no coordinates and old code requires a point
20260722123052	application_safe	additive partial geography index
20260722190604	forward_only	assignment history permits rows the old single-assignment model cannot interpret safely
20260723015032	application_safe	additive request-helper lookup index
20260724161628	application_safe	additive support conversation and status-history tables
20260731230828	forward_only	pending support verification status is not understood by older releases