ALTER TABLE "Notes" DROP CONSTRAINT "Notes_replyId_Notes_id_fk"; --> statement-breakpoint DROP INDEX IF EXISTS "Notes_uri_index";--> statement-breakpoint DO $$ BEGIN ALTER TABLE "Notes" ADD CONSTRAINT "Notes_replyId_Notes_id_fk" FOREIGN KEY ("replyId") REFERENCES "Notes"("id") ON DELETE cascade ON UPDATE cascade; EXCEPTION WHEN duplicate_object THEN null; END $$; --> statement-breakpoint ALTER TABLE "Notes" ADD CONSTRAINT "Notes_uri_unique" UNIQUE("uri");