Fix #6807 (#7213)

migration/1613503367223-use-bigint-for-driveUsage.ts

+import {MigrationInterface, QueryRunner} from "typeorm";
+
+export class useBigintForDriveUsage1613503367223 implements MigrationInterface {
+    name = 'useBigintForDriveUsage1613503367223'
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "instance" ALTER COLUMN "driveUsage" TYPE bigint`);
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "instance" DROP COLUMN "driveUsage"`);
+        await queryRunner.query(`ALTER TABLE "instance" ADD "driveUsage" integer NOT NULL DEFAULT 0`);
+    }
+
+}