fix: create base class instance using base meta

Signed-off-by: Pranav C <pranavxc@gmail.com>

packages/nocodb/src/lib/version-upgrader/ncAttachmentUpgrader.ts

@@ -4,7 +4,7 @@ import Base from '../models/Base';
 import Model from '../models/Model';
 import { XKnex } from '../db/sql-data-mapper/index';
 import NcConnectionMgrv2 from '../utils/common/NcConnectionMgrv2';
-import { UITypes } from 'nocodb-sdk';
+import { BaseType, UITypes } from 'nocodb-sdk'
 
 // before 0.103.0, an attachment object was like
 // [{
@@ -42,12 +42,13 @@ function getTnPath(knex: XKnex, tb: Model) {
 }
 
 export default async function ({ ncMeta }: NcUpgraderCtx) {
-  const bases: Base[] = await ncMeta.metaList2(null, null, MetaTable.BASES);
-  for (const base of bases) {
+  const bases: BaseType[] = await ncMeta.metaList2(null, null, MetaTable.BASES);
+  for (const _base of bases) {
+    const base = new Base(_base);
     const knex: XKnex = base.is_meta
       ? ncMeta.knexConnection
       : NcConnectionMgrv2.get(base);
-    const models = await (await Base.get(base.id, ncMeta)).getModels(ncMeta);
+    const models = await base.getModels(ncMeta);
     for (const model of models) {
       const updateRecords = [];
       const columns = await (