diff --git a/src/modelTypes/IProjectDuplicate.ts b/src/modelTypes/IProjectDuplicate.ts
index 98943f678..37419efd8 100644
--- a/src/modelTypes/IProjectDuplicate.ts
+++ b/src/modelTypes/IProjectDuplicate.ts
@@ -4,5 +4,5 @@ import type {IProject} from './IProject'
 export interface IProjectDuplicate extends IAbstract {
 	projectId: number
 	project: IProject
-	parentProjectId: number
+	parentProjectId: IProject['id']
 }
\ No newline at end of file
diff --git a/src/models/projectDuplicateModel.ts b/src/models/projectDuplicateModel.ts
index f490b5838..ed4f8534f 100644
--- a/src/models/projectDuplicateModel.ts
+++ b/src/models/projectDuplicateModel.ts
@@ -7,6 +7,7 @@ import type {IProject} from '@/modelTypes/IProject'
 export default class ProjectDuplicateModel extends AbstractModel<IProjectDuplicate> implements IProjectDuplicate {
 	projectId = 0
 	project: IProject = ProjectModel
+	parentProjectId = 0
 
 	constructor(data : Partial<IProjectDuplicate>) {
 		super()