Allow negative category and tag IDs

warden_server/warden_3.0_postgres.sql

@@ -19,7 +19,7 @@ CREATE COLLATION IF NOT EXISTS case_insensitive (
 --
 
 CREATE TABLE IF NOT EXISTS "categories" (
-  "id" int NOT NULL UNIQUE CHECK ("id" >= 0),
+  "id" int NOT NULL UNIQUE,
   "category" text NOT NULL COLLATE case_insensitive,
   "subcategory" text DEFAULT NULL COLLATE case_insensitive,
   "cat_subcat" text NOT NULL COLLATE case_insensitive
@@ -103,7 +103,7 @@ CREATE INDEX IF NOT EXISTS "client_id" ON "last_events" ("client_id", "event_id"
 --
 
 CREATE TABLE IF NOT EXISTS "tags" (
-  "id" int NOT NULL UNIQUE CHECK ("id" >= 0),
+  "id" int NOT NULL UNIQUE,
   "tag" text NOT NULL COLLATE case_insensitive
 );