diff --git a/src/core/server/saved_objects/migrations/core/document_migrator.ts b/src/core/server/saved_objects/migrations/core/document_migrator.ts
index cccd38bf5cc9e..51376bfbd8a0b 100644
--- a/src/core/server/saved_objects/migrations/core/document_migrator.ts
+++ b/src/core/server/saved_objects/migrations/core/document_migrator.ts
@@ -67,7 +67,7 @@ import { SavedObjectMigrationFn, SavedObjectMigrationMap } from '../types';
 import { DEFAULT_NAMESPACE_STRING } from '../../service/lib/utils';
 import { LegacyUrlAlias, LEGACY_URL_ALIAS_TYPE } from '../../object_types';
 
-const DEFAULT_MINIMUM_CONVERT_VERSION = '8.0.0';
+const DEFAULT_MINIMUM_CONVERT_VERSION = '7.13.0';
 
 export type MigrateFn = (doc: SavedObjectUnsanitizedDoc) => SavedObjectUnsanitizedDoc;
 export type MigrateAndConvertFn = (doc: SavedObjectUnsanitizedDoc) => SavedObjectUnsanitizedDoc[];
@@ -850,7 +850,8 @@ function assertNoDowngrades(
  * that we can later regenerate any inbound object references to match.
  *
  * @note This is only intended to be used when single-namespace object types are converted into multi-namespace object types.
+ * @internal
  */
-function deterministicallyRegenerateObjectId(namespace: string, type: string, id: string) {
+export function deterministicallyRegenerateObjectId(namespace: string, type: string, id: string) {
   return uuidv5(`${namespace}:${type}:${id}`, uuidv5.DNS); // the uuidv5 namespace constant (uuidv5.DNS) is arbitrary
 }
diff --git a/src/core/server/saved_objects/migrationsv2/integration_tests/actions.test.ts b/src/core/server/saved_objects/migrationsv2/integration_tests/actions.test.ts
index 0e1941f9070bd..b31f20950ae77 100644
--- a/src/core/server/saved_objects/migrationsv2/integration_tests/actions.test.ts
+++ b/src/core/server/saved_objects/migrationsv2/integration_tests/actions.test.ts
@@ -865,7 +865,7 @@ describe('migration actions', () => {
       await expect(docsResponse.right.outdatedDocuments.length).toBe(3);
     });
 
-    it('excludes documents with types listed in unusedTypesToExclude', async () => {
+    it('it excludes documents not matching the provided "unusedTypesQuery"', async () => {
       const openPitTask = openPit(client, 'existing_index_with_docs');
       const pitResponse = (await openPitTask()) as Either.Right<OpenPitResponse>;
 
@@ -941,11 +941,11 @@ describe('migration actions', () => {
         { _id: 'foo:2', _source: { type: 'dashboard', value: 2 } },
       ];
 
-      const creteIndexTask = createIndex(client, index, {
+      const createIndexTask = createIndex(client, index, {
         dynamic: true,
         properties: {},
       });
-      await creteIndexTask();
+      await createIndexTask();
 
       async function tranformRawDocs(docs: SavedObjectsRawDoc[]): Promise<SavedObjectsRawDoc[]> {
         for (const doc of docs) {
diff --git a/src/core/server/saved_objects/migrationsv2/integration_tests/rewriting_id.test.ts b/src/core/server/saved_objects/migrationsv2/integration_tests/rewriting_id.test.ts
index a70e8ead7c61d..1b61394ba05a0 100644
--- a/src/core/server/saved_objects/migrationsv2/integration_tests/rewriting_id.test.ts
+++ b/src/core/server/saved_objects/migrationsv2/integration_tests/rewriting_id.test.ts
@@ -9,11 +9,11 @@
 import Path from 'path';
 import Fs from 'fs';
 import Util from 'util';
-import uuidv5 from 'uuid/v5';
 import { kibanaPackageJson as pkg } from '@kbn/utils';
 import * as kbnTestServer from '../../../../test_helpers/kbn_server';
 import type { ElasticsearchClient } from '../../../elasticsearch';
 import { Root } from '../../../root';
+import { deterministicallyRegenerateObjectId } from '../../migrations/core/document_migrator';
 
 const logFilePath = Path.join(__dirname, 'migration_test_kibana.log');
 
@@ -147,7 +147,7 @@ describe('migration v2', () => {
       hidden: false,
       mappings: { properties: { name: { type: 'text' } } },
       namespaceType: 'multiple',
-      convertToMultiNamespaceTypeVersion: '8.0.0',
+      convertToMultiNamespaceTypeVersion: '7.13.0',
     });
 
     coreSetup.savedObjects.registerType({
@@ -155,7 +155,7 @@ describe('migration v2', () => {
       hidden: false,
       mappings: { properties: { nomnom: { type: 'integer' } } },
       namespaceType: 'multiple-isolated',
-      convertToMultiNamespaceTypeVersion: '8.0.0',
+      convertToMultiNamespaceTypeVersion: '7.13.0',
     });
 
     const coreStart = await root.start();
@@ -165,8 +165,8 @@ describe('migration v2', () => {
 
     // each newly converted multi-namespace object in a non-default space has its ID deterministically regenerated, and a legacy-url-alias
     // object is created which links the old ID to the new ID
-    const newFooId = uuidv5('spacex:foo:1', uuidv5.DNS);
-    const newBarId = uuidv5('spacex:bar:1', uuidv5.DNS);
+    const newFooId = deterministicallyRegenerateObjectId('spacex', 'foo', '1');
+    const newBarId = deterministicallyRegenerateObjectId('spacex', 'bar', '1');
 
     expect(migratedDocs).toEqual(
       [
@@ -176,7 +176,7 @@ describe('migration v2', () => {
           foo: { name: 'Foo 1 default' },
           references: [],
           namespaces: ['default'],
-          migrationVersion: { foo: '8.0.0' },
+          migrationVersion: { foo: '7.13.0' },
           coreMigrationVersion: pkg.version,
         },
         {
@@ -186,7 +186,7 @@ describe('migration v2', () => {
           references: [],
           namespaces: ['spacex'],
           originId: '1',
-          migrationVersion: { foo: '8.0.0' },
+          migrationVersion: { foo: '7.13.0' },
           coreMigrationVersion: pkg.version,
         },
         {
@@ -208,7 +208,7 @@ describe('migration v2', () => {
           bar: { nomnom: 1 },
           references: [{ type: 'foo', id: '1', name: 'Foo 1 default' }],
           namespaces: ['default'],
-          migrationVersion: { bar: '8.0.0' },
+          migrationVersion: { bar: '7.13.0' },
           coreMigrationVersion: pkg.version,
         },
         {
@@ -218,7 +218,7 @@ describe('migration v2', () => {
           references: [{ type: 'foo', id: newFooId, name: 'Foo 1 spacex' }],
           namespaces: ['spacex'],
           originId: '1',
-          migrationVersion: { bar: '8.0.0' },
+          migrationVersion: { bar: '7.13.0' },
           coreMigrationVersion: pkg.version,
         },
         {
diff --git a/src/core/server/saved_objects/migrationsv2/model.ts b/src/core/server/saved_objects/migrationsv2/model.ts
index 1e917b986f93f..2097b1de88aab 100644
--- a/src/core/server/saved_objects/migrationsv2/model.ts
+++ b/src/core/server/saved_objects/migrationsv2/model.ts
@@ -506,8 +506,9 @@ export const model = (currentState: State, resW: ResponseType<AllActionStates>):
   } else if (stateP.controlState === 'REINDEX_SOURCE_TO_TEMP_CLOSE_PIT') {
     const res = resW as ExcludeRetryableEsError<ResponseType<typeof stateP.controlState>>;
     if (Either.isRight(res)) {
+      const { sourceIndexPitId, ...state } = stateP;
       return {
-        ...stateP,
+        ...state,
         controlState: 'SET_TEMP_WRITE_BLOCK',
         sourceIndex: stateP.sourceIndex as Option.Some<string>,
       };