diff --git a/packages/postgrest-core/src/delete-fetcher.ts b/packages/postgrest-core/src/delete-fetcher.ts
index df2400ac..d7ad0767 100644
--- a/packages/postgrest-core/src/delete-fetcher.ts
+++ b/packages/postgrest-core/src/delete-fetcher.ts
@@ -13,6 +13,7 @@ import {
   BuildNormalizedQueryOps,
   buildNormalizedQuery,
 } from './fetch/build-normalized-query';
+import { isNestedPath } from './lib/group-paths-recursive';
 
 export type DeleteFetcher<T extends GenericTable, R> = (
   input: Partial<T['Row']>[],
@@ -45,7 +46,8 @@ export const buildDeleteFetcher =
     const query = buildNormalizedQuery<Q>(opts);
 
     const pkAlias = (path: string): string =>
-      query?.paths.find((p) => p.path === path)?.alias || path;
+      query?.paths.find((p) => p.path === path && !isNestedPath(p))?.alias ||
+      path;
 
     if (primaryKeys.length === 1) {
       const primaryKey = primaryKeys[0] as string;
diff --git a/packages/postgrest-core/src/update-fetcher.ts b/packages/postgrest-core/src/update-fetcher.ts
index a9a32204..815ee166 100644
--- a/packages/postgrest-core/src/update-fetcher.ts
+++ b/packages/postgrest-core/src/update-fetcher.ts
@@ -13,6 +13,7 @@ import {
   buildNormalizedQuery,
   BuildNormalizedQueryOps,
 } from './fetch/build-normalized-query';
+import { isNestedPath } from './lib/group-paths-recursive';
 
 export type UpdateFetcher<T extends GenericTable, R> = (
   input: Partial<T['Row']>,
@@ -45,7 +46,8 @@ export const buildUpdateFetcher =
     const query = buildNormalizedQuery<Q>(opts);
 
     const pkAlias = (path: string): string =>
-      query?.paths.find((p) => p.path === path)?.alias || path;
+      query?.paths.find((p) => p.path === path && !isNestedPath(p))?.alias ||
+      path;
 
     for (const key of primaryKeys) {
       const value = input[key];