fix: attribute default license optional on org unit

src/app/models/index.ts

@@ -193,7 +193,7 @@ export interface OrganizationalUnit extends OrganizationalUnitPartial {
   institutions?: Institution[];
   researchDomains?: ResearchDomain[];
   keywords?: string[];
-  defaultLicense: License;
+  defaultLicense?: License;
 }
 
 export interface Page extends PagePartial {