diff --git a/src/controllers/PositionController.ts b/src/controllers/PositionController.ts
index 7a7500eb..10305697 100644
--- a/src/controllers/PositionController.ts
+++ b/src/controllers/PositionController.ts
@@ -745,15 +745,13 @@ export class PositionController extends Controller {
             posMasterNo: posMaster.posMasterNo,
             posMasterNoSuffix: posMaster.posMasterNoSuffix,
             fullNameNextHolder:
-              posMaster.current_holder.prefix +
-              posMaster.current_holder.firstName +
-              " " +
-              posMaster.current_holder.lastName,
+              posMaster.current_holder == null
+                ? null
+                : `${posMaster.current_holder.prefix}${posMaster.current_holder.firstName} ${posMaster.current_holder.lastName}`,
             fullNameCurrentHolder:
-              posMaster.next_holder.prefix +
-              posMaster.next_holder.firstName +
-              " " +
-              posMaster.next_holder.lastName,
+              posMaster.next_holder == null
+                ? null
+                : `${posMaster.next_holder.prefix}${posMaster.next_holder.firstName} ${posMaster.next_holder.lastName}`,
             orgShortname:
               body.type === 0
                 ? posMaster.orgRoot.orgRootShortName