diff --git a/packages/backend/migration/1652210810723-PGroonga.js b/packages/backend/migration/1652210810723-PGroonga.js
deleted file mode 100644
index bd3fee34e..000000000
--- a/packages/backend/migration/1652210810723-PGroonga.js
+++ /dev/null
@@ -1,11 +0,0 @@
-export class PGroonga1652210810723 {
-    name = 'PGroonga1652210810723'
-
-    async up(queryRunner) {
-        await queryRunner.query(`CREATE INDEX "IDX_f27f5d88941e57442be75ba9c8" ON "note" USING "pgroonga" ("text")`);
-    }
-
-    async down(queryRunner) {
-        await queryRunner.query(`DROP INDEX "public"."IDX_f27f5d88941e57442be75ba9c8"`);
-    }
-}
diff --git a/packages/backend/migration/1652213168020-PGroongaUserName.js b/packages/backend/migration/1652213168020-PGroongaUserName.js
deleted file mode 100644
index 9e1e75ece..000000000
--- a/packages/backend/migration/1652213168020-PGroongaUserName.js
+++ /dev/null
@@ -1,11 +0,0 @@
-export class PGroongaUserName1652213168020 {
-    name = 'PGroongaUserName1652213168020'
-
-    async up(queryRunner) {
-        await queryRunner.query(`CREATE INDEX "IDX_065d4d8f3b5adb4a08841eae3c" ON "user" USING "pgroonga" ("name" pgroonga_varchar_full_text_search_ops_v2)`);
-    }
-
-    async down(queryRunner) {
-        await queryRunner.query(`DROP INDEX "public"."IDX_065d4d8f3b5adb4a08841eae3c"`);
-    }
-}
diff --git a/packages/backend/migration/1652213556290-PGroongaUserDescription.js b/packages/backend/migration/1652213556290-PGroongaUserDescription.js
deleted file mode 100644
index 7216438ab..000000000
--- a/packages/backend/migration/1652213556290-PGroongaUserDescription.js
+++ /dev/null
@@ -1,11 +0,0 @@
-export class PGroongaUserDescription1652213556290 {
-    name = 'PGroongaUserDescription1652213556290'
-
-    async up(queryRunner) {
-        await queryRunner.query(`CREATE INDEX "IDX_fcb770976ff8240af5799e3ffc" ON "user_profile" USING "pgroonga" ("description" pgroonga_varchar_full_text_search_ops_v2) `);
-    }
-
-    async down(queryRunner) {
-        await queryRunner.query(`DROP INDEX "public"."IDX_fcb770976ff8240af5799e3ffc"`);
-    }
-}
diff --git a/pgroonga.diff b/pgroonga.diff
deleted file mode 100644
index c960ba5d9..000000000
--- a/pgroonga.diff
+++ /dev/null
@@ -1,51 +0,0 @@
-diff --git a/packages/backend/migration/1652210810723-PGroonga.js b/packages/backend/migration/1652210810723-PGroonga.js
-new file mode 100644
-index 000000000..bd3fee34e
---- /dev/null
-+++ b/packages/backend/migration/1652210810723-PGroonga.js
-@@ -0,0 +1,11 @@
-+export class PGroonga1652210810723 {
-+    name = 'PGroonga1652210810723'
-+
-+    async up(queryRunner) {
-+        await queryRunner.query(`CREATE INDEX "IDX_f27f5d88941e57442be75ba9c8" ON "note" USING "pgroonga" ("text")`);
-+    }
-+
-+    async down(queryRunner) {
-+        await queryRunner.query(`DROP INDEX "public"."IDX_f27f5d88941e57442be75ba9c8"`);
-+    }
-+}
-diff --git a/packages/backend/migration/1652213168020-PGroongaUserName.js b/packages/backend/migration/1652213168020-PGroongaUserName.js
-new file mode 100644
-index 000000000..9e1e75ece
---- /dev/null
-+++ b/packages/backend/migration/1652213168020-PGroongaUserName.js
-@@ -0,0 +1,11 @@
-+export class PGroongaUserName1652213168020 {
-+    name = 'PGroongaUserName1652213168020'
-+
-+    async up(queryRunner) {
-+        await queryRunner.query(`CREATE INDEX "IDX_065d4d8f3b5adb4a08841eae3c" ON "user" USING "pgroonga" ("name" pgroonga_varchar_full_text_search_ops_v2)`);
-+    }
-+
-+    async down(queryRunner) {
-+        await queryRunner.query(`DROP INDEX "public"."IDX_065d4d8f3b5adb4a08841eae3c"`);
-+    }
-+}
-diff --git a/packages/backend/migration/1652213556290-PGroongaUserDescription.js b/packages/backend/migration/1652213556290-PGroongaUserDescription.js
-new file mode 100644
-index 000000000..7216438ab
---- /dev/null
-+++ b/packages/backend/migration/1652213556290-PGroongaUserDescription.js
-@@ -0,0 +1,11 @@
-+export class PGroongaUserDescription1652213556290 {
-+    name = 'PGroongaUserDescription1652213556290'
-+
-+    async up(queryRunner) {
-+        await queryRunner.query(`CREATE INDEX "IDX_fcb770976ff8240af5799e3ffc" ON "user_profile" USING "pgroonga" ("description" pgroonga_varchar_full_text_search_ops_v2) `);
-+    }
-+
-+    async down(queryRunner) {
-+        await queryRunner.query(`DROP INDEX "public"."IDX_fcb770976ff8240af5799e3ffc"`);
-+    }
-+}