diff --git a/cmd/mesh-controller/plans_gone_store_integration_test.go b/cmd/mesh-controller/plans_gone_store_integration_test.go
index d8bd652c..fbd7dbec 100644
--- a/cmd/mesh-controller/plans_gone_store_integration_test.go
+++ b/cmd/mesh-controller/plans_gone_store_integration_test.go
@@ -3,25 +3,17 @@
 package main
 
 import (
-	"strings"
 	"testing"
 
 	"git.novox.be/novox/mesh-sdk/go/catalogue"
 )
 
-// **The controller opens on a store whose plan tables are gone** (novox/hq ADR 0539 §17, issue 1945 B9): migration 0108 has
-// dropped the record of sends, the assignment generation, the gate's verdicts and the durations, and the controller still
-// assigns a module, reads where it runs, takes it off and reads the nodes.
-func TestTheControllerOpensOnAStoreWithoutThePlanTables(t *testing.T) {
+// **The controller opens on a store after release 6's migrations, which drop nothing the controller of before reads** (issue
+// 1945, review round 1): it assigns a module, reads where it runs and the nodes. Release 6 reads none of the plans' tables.
+func TestTheControllerOpensOnTheStoreAfterReleaseSix(t *testing.T) {
 	open := aMesh(t)
 	ctx := t.Context()
 	inv := open.inventory
-	for _, row := range inv.QueryForTest(t, `select table_name::text from information_schema.tables where table_schema = 'public'`) {
-		switch name := strings.Trim(row[0], `"`); name {
-		case "declaration_send", "assignment_generation", "build_gate", "duration":
-			t.Errorf("the table %s is in the store", name)
-		}
-	}
 	register(t, open, catalogue.Manifest{Module: "notes", Version: "1"})
 	if _, err := assign(ctx, open, "anchor", "notes"); err != nil {
 		t.Fatalf("assign on the migrated store: %v", err)
diff --git a/internal/inventory/c5_still_reads_test.go b/internal/inventory/c5_still_reads_test.go
new file mode 100644
index 00000000..3583a088
--- /dev/null
+++ b/internal/inventory/c5_still_reads_test.go
@@ -0,0 +1,32 @@
+//go:build integration
+
+package inventory
+
+import "testing"
+
+// **The store after release 6's migrations is still one today's controller (C5) can read** (issue 1945, review round 1): the
+// revert path puts C5 back, either by the witness or by the operator's want, and it reads the columns of the node row that
+// recorded a send (sent, sent_at, sent_bus_users, sent_builds, sent_epoch, sent_summary, sent_generation, sent_provisioning)
+// and the tables of the plans' machinery (build_gate, declaration_send, assignment_generation, duration). Release 6 reads
+// none of them any more and drops none: they go in a later milestone, once C5 has left the controller's five newest
+// fingerprints. Each query below is one C5 ran.
+func TestTheStoreAfterReleaseSixIsStillOneTheControllerOfBeforeCanRead(t *testing.T) {
+	inv := ForTest(t)
+	ctx := t.Context()
+	if _, err := inv.AddNode(ctx, "anchor"); err != nil {
+		t.Fatal(err)
+	}
+	for _, q := range []string{
+		`select sent, sequence, sent_at, sent_provisioning from node`,
+		`select sent_bus_users, sent_builds, sent_epoch, sent_summary, sent_generation from node`,
+		`select name, sent, sent_at from node order by name`,
+		`select build from build_gate where verdict = 'failed'`,
+		`select count(*) from declaration_send`,
+		`select generation from assignment_generation`,
+		`select kind, subject, ref, took_ms from duration`,
+	} {
+		if _, err := inv.store.Pool().Exec(ctx, q); err != nil {
+			t.Errorf("a query of the controller of before no longer runs on the store: %s: %v", q, err)
+		}
+	}
+}
diff --git a/internal/inventory/migrations/0108-the-plans-leave-the-store.sql b/internal/inventory/migrations/0108-the-plans-leave-the-store.sql
deleted file mode 100644
index 6d3ab18c..00000000
--- a/internal/inventory/migrations/0108-the-plans-leave-the-store.sql
+++ /dev/null
@@ -1,16 +0,0 @@
--- The tables of the delivery plans' machinery leave the store (novox/hq ADR 0539 §17, design 47 release 6, issue 1945).
---
--- A machine follows its wants and applies a module from the composition the controller writes for it (ADR 0539 §1, §2), so
--- the controller keeps no record of what it sent, no counter of the assignments a send was composed from, no verdict of a
--- gate that judged a build on its first machine and no measure of how long a plan's tier or a machine's apply took. This
--- drops the four tables that kept them: declaration_send (0094), assignment_generation (0094), build_gate (0073) and duration
--- (0066, 0075).
---
--- **It is one-way**: a controller older than this schema is refused by the put-back gate (the highest migration it carries is
--- recorded by its version, issue 352). What stays: the node row and its columns (the digest of the last send, which the old
--- reads of `status` still name until they go with their verbs), the bus step, the core box and the refused registrations.
--- The function raise_assignment_generation and its triggers went with 0105.
-drop table if exists declaration_send;
-drop table if exists assignment_generation;
-drop table if exists build_gate;
-drop table if exists duration;
diff --git a/internal/inventory/migrations/0109-the-node-keeps-no-record-of-a-send.sql b/internal/inventory/migrations/0109-the-node-keeps-no-record-of-a-send.sql
deleted file mode 100644
index 638ff825..00000000
--- a/internal/inventory/migrations/0109-the-node-keeps-no-record-of-a-send.sql
+++ /dev/null
@@ -1,11 +0,0 @@
--- The node row keeps no record of a send's builds, epoch, summary or generation (novox/hq ADR 0539 §5, §17, issue 1945).
---
--- Nothing sends a declaration any more, so nothing writes what a send carried: the commit of each module (sent_builds, which
--- 0105 kept only as the source of the one-time copy onto the assignments, long done), the lease epoch (sent_epoch, 0068), the
--- summary `plan --diff` compared (sent_summary, 0078) and the assignment generation (sent_generation, 0094). **It is one-way**,
--- as 0108. What stays: sent and sent_at (the digest and time of the last send), sent_bus_users and sent_provisioning, which holds the
--- provisioner's plans of each composition (inventory.RecordComposedPlans); 0110 drops the first three.
-alter table node drop column if exists sent_builds;
-alter table node drop column if exists sent_epoch;
-alter table node drop column if exists sent_summary;
-alter table node drop column if exists sent_generation;
diff --git a/internal/inventory/migrations/0110-the-node-keeps-no-digest-of-a-send.sql b/internal/inventory/migrations/0110-the-node-keeps-no-digest-of-a-send.sql
deleted file mode 100644
index 77d2a6d6..00000000
--- a/internal/inventory/migrations/0110-the-node-keeps-no-digest-of-a-send.sql
+++ /dev/null
@@ -1,11 +0,0 @@
--- The node row keeps no digest of a send, nor when it was made (novox/hq ADR 0539 §5, §9, §17, issue 1945).
---
--- A machine is not sent a declaration, so nothing records one: whether a machine has what is wanted of it is read from its
--- haves beside the assigner's wants, a given value is replaced when a have of its module is first running and healthy, and the
--- bus's user list is part of the bus module's composition, which the bus machine's have names or does not. This drops what
--- the last readers of a send's record read: node.sent and node.sent_at (0014), and node.sent_bus_users (0058). **It is
--- one-way**, as 0108 and 0109. node.sent_provisioning stays: it holds the provisioner's plans of each composition
--- (inventory.RecordComposedPlans).
-alter table node drop column if exists sent;
-alter table node drop column if exists sent_at;
-alter table node drop column if exists sent_bus_users;
diff --git a/internal/inventory/plans_leave_the_store_test.go b/internal/inventory/plans_leave_the_store_test.go
deleted file mode 100644
index 37a43cc4..00000000
--- a/internal/inventory/plans_leave_the_store_test.go
+++ /dev/null
@@ -1,111 +0,0 @@
-//go:build integration
-
-package inventory
-
-import (
-	"strings"
-	"testing"
-)
-
-// **Migration 0108 drops the tables of the delivery plans' machinery** (novox/hq ADR 0539 §17, design 47 release 6, issue 1945):
-// the record of each send, the assignment generation, the gate's verdicts and the measured durations. The store is built as
-// the mesh holds it before the migration, with a row in each, and after it the four are gone and what the controller still
-// keeps stays: the node and its columns, the module, the bus step, the core box and the refused registrations.
-func TestMigration0108DropsTheTablesOfThePlansMachineryAndKeepsWhatTheControllerStillKeeps(t *testing.T) {
-	inv, migrate := ForTestBefore(t, 108)
-	tables := func() map[string]bool {
-		t.Helper()
-		out := map[string]bool{}
-		for _, row := range inv.QueryForTest(t, `select table_name::text from information_schema.tables where table_schema = 'public'`) {
-			out[strings.Trim(row[0], `"`)] = true
-		}
-		return out
-	}
-	gone := []string{"declaration_send", "assignment_generation", "build_gate", "duration"}
-	before := tables()
-	for _, name := range gone {
-		if !before[name] {
-			t.Fatalf("the table %s is not in the store before the migration", name)
-		}
-	}
-	migrate()
-	after := tables()
-	for _, name := range gone {
-		if after[name] {
-			t.Errorf("the table %s is still in the store", name)
-		}
-	}
-	for _, stays := range []string{"node", "module", "bus_step", "core_box", "build_refused", "controller_schema"} {
-		if !after[stays] {
-			t.Errorf("the table %s is gone", stays)
-		}
-	}
-	// The functions and triggers the tables carried go with them.
-	if rows := inv.QueryForTest(t, `select count(*) from pg_proc where proname = 'raise_assignment_generation'`); rows[0][0] != "0" {
-		t.Errorf("the function raise_assignment_generation is still in the store")
-	}
-}
-
-// **Migration 0109 drops the columns of the node row that kept what a send carried** (ADR 0539 §17, issue 1945): the builds,
-// the epoch, the summary and the generation. The provisioner's plans stay (0110 drops the rest).
-func TestMigration0109DropsWhatASendCarriedFromTheNodeRow(t *testing.T) {
-	inv, migrate := ForTestBefore(t, 109)
-	columns := func() map[string]bool {
-		t.Helper()
-		out := map[string]bool{}
-		for _, row := range inv.QueryForTest(t, `select column_name::text from information_schema.columns where table_name = 'node'`) {
-			out[strings.Trim(row[0], `"`)] = true
-		}
-		return out
-	}
-	gone := []string{"sent_builds", "sent_epoch", "sent_summary", "sent_generation"}
-	before := columns()
-	for _, name := range gone {
-		if !before[name] {
-			t.Fatalf("node.%s is not in the store before the migration", name)
-		}
-	}
-	migrate()
-	after := columns()
-	for _, name := range gone {
-		if after[name] {
-			t.Errorf("node.%s is still in the store", name)
-		}
-	}
-	for _, stays := range []string{"sent_provisioning"} {
-		if !after[stays] {
-			t.Errorf("node.%s is gone", stays)
-		}
-	}
-}
-
-// **Migration 0110 drops the digest and time of a send, and the bus users' digest, from the node row** (ADR 0539 §17, issue
-// 1945): the haves answer what a machine has. The provisioner's plans stay.
-func TestMigration0110DropsTheDigestOfASendFromTheNodeRow(t *testing.T) {
-	inv, migrate := ForTestBefore(t, 110)
-	columns := func() map[string]bool {
-		t.Helper()
-		out := map[string]bool{}
-		for _, row := range inv.QueryForTest(t, `select column_name::text from information_schema.columns where table_name = 'node'`) {
-			out[strings.Trim(row[0], `"`)] = true
-		}
-		return out
-	}
-	gone := []string{"sent", "sent_at", "sent_bus_users"}
-	before := columns()
-	for _, name := range gone {
-		if !before[name] {
-			t.Fatalf("node.%s is not in the store before the migration", name)
-		}
-	}
-	migrate()
-	after := columns()
-	for _, name := range gone {
-		if after[name] {
-			t.Errorf("node.%s is still in the store", name)
-		}
-	}
-	if !after["sent_provisioning"] {
-		t.Errorf("node.sent_provisioning is gone")
-	}
-}