diff --git a/packages/backend/migration/1756062689648-NonCascadingPageEyeCatching.js b/packages/backend/migration/1756062689648-NonCascadingPageEyeCatching.js
new file mode 100644
index 0000000000..8554cc4304
--- /dev/null
+++ b/packages/backend/migration/1756062689648-NonCascadingPageEyeCatching.js
@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class NonCascadingPageEyeCatching1756062689648 {
+    name = 'NonCascadingPageEyeCatching1756062689648'
+
+    async up(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "page" DROP CONSTRAINT "FK_a9ca79ad939bf06066b81c9d3aa"`);
+        await queryRunner.query(`ALTER TABLE "page" ADD CONSTRAINT "FK_a9ca79ad939bf06066b81c9d3aa" FOREIGN KEY ("eyeCatchingImageId") REFERENCES "drive_file"("id") ON DELETE SET NULL ON UPDATE NO ACTION`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "page" DROP CONSTRAINT "FK_a9ca79ad939bf06066b81c9d3aa"`);
+        await queryRunner.query(`ALTER TABLE "page" ADD CONSTRAINT "FK_a9ca79ad939bf06066b81c9d3aa" FOREIGN KEY ("eyeCatchingImageId") REFERENCES "drive_file"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+    }
+}
diff --git a/packages/backend/src/models/Page.ts b/packages/backend/src/models/Page.ts
index 0b59e7a92c..d112a66c04 100644
--- a/packages/backend/src/models/Page.ts
+++ b/packages/backend/src/models/Page.ts
@@ -69,7 +69,7 @@ export class MiPage {
 	public eyeCatchingImageId: MiDriveFile['id'] | null;
 
 	@ManyToOne(type => MiDriveFile, {
-		onDelete: 'CASCADE',
+		onDelete: 'SET NULL',
 	})
 	@JoinColumn()
 	public eyeCatchingImage: MiDriveFile | null;