diff --git a/apps/backend/src/app/db/schema.ts b/apps/backend/src/app/db/schema.ts
index a8135ce..8f838cd 100644
--- a/apps/backend/src/app/db/schema.ts
+++ b/apps/backend/src/app/db/schema.ts
@@ -61,11 +61,14 @@ export const FilesTable = pgTable("files", {
 		})
 		.notNull(),
 
+	checksum: p.varchar("checksum", {
+		length: 64
+	}).notNull(),
+
 	uploader: p
 		.varchar("uploader", {
 			length: 64,
 		})
-		.default("anonyme")
 		.notNull(),
 
 	groupId: p
@@ -117,6 +120,7 @@ export const FilesTypesTable = pgTable("f_types", {
 		.varchar("type_name", {
 			length: 64,
 		})
+		.unique()
 		.notNull(),
 
 	mime: p