diff --git a/lib/modules/datasource/nuget/index.spec.ts b/lib/modules/datasource/nuget/index.spec.ts
index 571727091dfd741d8c755901acf4e8be6e379d5e..55a8664cff5cabaa99d4c2833c703bdb3c4cb949 100644
--- a/lib/modules/datasource/nuget/index.spec.ts
+++ b/lib/modules/datasource/nuget/index.spec.ts
@@ -385,7 +385,7 @@ describe('modules/datasource/nuget/index', () => {
           'Determined sourceUrl https://github.com/NLog/NLog.git from https://some-registry/v3-flatcontainer/nlog/4.7.3/nlog.4.7.3.nupkg',
         );
         expect(packageCache.set).toHaveBeenCalledWith(
-          'datasource-nuget',
+          'datasource-nuget-v3',
           'cache-decorator:source-url:https://some-registry/v3/index.json:NLog',
           {
             cachedAt: expect.any(String),
@@ -455,7 +455,7 @@ describe('modules/datasource/nuget/index', () => {
           registryUrls: ['https://some-registry/v3/index.json'],
         });
         expect(packageCache.set).toHaveBeenCalledWith(
-          'datasource-nuget',
+          'datasource-nuget-v3',
           'cache-decorator:source-url:https://some-registry/v3/index.json:NLog',
           {
             cachedAt: expect.any(String),
diff --git a/lib/modules/datasource/nuget/v3.ts b/lib/modules/datasource/nuget/v3.ts
index f48781cdc9ba2d1520aaf35bab23e69127b5509d..2e6e289bf0478a37fcd426c2256c0a308e1c24df 100644
--- a/lib/modules/datasource/nuget/v3.ts
+++ b/lib/modules/datasource/nuget/v3.ts
@@ -25,7 +25,7 @@ import type {
 } from './types';
 
 export class NugetV3Api {
-  static readonly cacheNamespace = 'datasource-nuget';
+  static readonly cacheNamespace = 'datasource-nuget-v3';
 
   async getResourceUrl(
     http: Http,
diff --git a/lib/util/cache/package/types.ts b/lib/util/cache/package/types.ts
index ad2ec69f118904cfacbe63bd368ceb18247bf6b5..180b5d628026c10dcfcc3038658e2a71c4878044 100644
--- a/lib/util/cache/package/types.ts
+++ b/lib/util/cache/package/types.ts
@@ -88,7 +88,7 @@ export type PackageCacheNamespace =
   | 'datasource-maven:metadata-xml'
   | 'datasource-node-version'
   | 'datasource-npm:data'
-  | 'datasource-nuget'
+  | 'datasource-nuget-v3'
   | 'datasource-orb'
   | 'datasource-packagist-org'
   | 'datasource-packagist-public-files'