test: fix seed helper, was causing errors in versions suite

test/helpers/seed.ts

@@ -73,10 +73,9 @@ export async function seedDB({
   // Dropping the db breaks indexes (on mongoose - did not test extensively on postgres yet), so we recreate them here
   if (shouldResetDB) {
     if (isMongoose(_payload)) {
-      const db = _payload.db as MongooseAdapter
       await Promise.all([
-        Object.entries(db.collections).map(async ([_, collection]) => {
-          await collection.createIndexes()
+        ...collectionSlugs.map(async (collectionSlug) => {
+          await _payload.db.collections[collectionSlug].createIndexes()
         }),
       ])
     }