hotfix: uniform color migration fix

packages/backend/migration/1652859567549-uniform-themecolor.js

@@ -6,27 +6,25 @@ export class uniformThemecolor1652859567549 {
 	async up(queryRunner) {
 		const formatColor = (color) => {
 			let tc = new tinycolor(color);
-			if (color.isValid()) {
-				return color.toHexString();
+			if (tc.isValid()) {
+				return tc.toHexString();
 			} else {
 				return null;
 			}
 		};
 
-		await Promise.all(queryRunner.query('SELECT "id", "themeColor" FROM "instance" WHERE "themeColor" IS NOT NULL')
-		.then(instances => instances.map(instance => {
+		await queryRunner.query('SELECT "id", "themeColor" FROM "instance" WHERE "themeColor" IS NOT NULL')
+		.then(instances => Promise.all(instances.map(instance => {
 			// update theme color to uniform format, e.g. #00ff00
 			// invalid theme colors get set to null
-			instance.color = formatColor(instance.color);
-
-			return queryRunner.query('UPDATE "instance" SET "themeColor" = :themeColor WHERE "id" = :id', instance);
+			return queryRunner.query('UPDATE "instance" SET "themeColor" = $1 WHERE "id" = $2', [formatColor(instance.themeColor), instance.id]);
 		})));
 
 		// also fix own theme color
 		await queryRunner.query('SELECT "themeColor" FROM "meta" WHERE "themeColor" IS NOT NULL LIMIT 1')
 		.then(metas => {
 			if (metas.length > 0) {
-				return queryRunner.query('UPDATE "meta" SET "themeColor" = :color', { color: formatColor(metas[0].color) });
+				return queryRunner.query('UPDATE "meta" SET "themeColor" = $1', [formatColor(metas[0].themeColor)]);
 			}
 		});
 	}