diff --git a/packages/twenty-server/src/engine/core-modules/application/application.service.ts b/packages/twenty-server/src/engine/core-modules/application/application.service.ts
index 6e67d8b63ec..9d738347fd8 100644
--- a/packages/twenty-server/src/engine/core-modules/application/application.service.ts
+++ b/packages/twenty-server/src/engine/core-modules/application/application.service.ts
@@ -452,6 +452,13 @@ export class ApplicationService {
       );
     }
 
+    // Nullify file FK references before deleting files to avoid
+    // RESTRICT constraint violation (application references file via packageJsonFileId/yarnLockFileId)
+    await this.applicationRepository.update(
+      { universalIdentifier, workspaceId },
+      { packageJsonFileId: null, yarnLockFileId: null },
+    );
+
     await this.fileStorageService.deleteApplicationFiles({
       workspaceId,
       applicationUniversalIdentifier: universalIdentifier,