diff --git a/roomserver/storage/postgres/deltas/20210416150927_state_blocks_refactor.go b/roomserver/storage/postgres/deltas/20210416150927_state_blocks_refactor.go
index 46ac7116..b2aa9dcc 100644
--- a/roomserver/storage/postgres/deltas/20210416150927_state_blocks_refactor.go
+++ b/roomserver/storage/postgres/deltas/20210416150927_state_blocks_refactor.go
@@ -138,13 +138,6 @@ func UpStateBlocksRefactor(tx *sql.Tx) error {
 			}
 			newblocks = append(newblocks, blocknid)
 
-			_, err = tx.Exec(`
-				DELETE FROM roomserver_state_block WHERE state_block_nid=$1
-			`, block)
-			if err != nil {
-				return fmt.Errorf("tx.Exec (delete old block): %w", err)
-			}
-
 			if snapshot != lastsnapshot {
 				var newsnapshot types.StateSnapshotNID
 				err = tx.QueryRow(`