fix Parameters qrCode field type

models/Organization/Parameters.ts

@@ -103,7 +103,7 @@ export default class Parameters extends ApiModel {
   @Bool(false, { notNullable: true })
   declare studentsAreAdherents: boolean
 
-  @Num(null)
+  @Attr(null)
   @IriEncoded(File)
   declare qrCode: number | null