diff --git a/backend/pom.xml b/backend/pom.xml
index 8b3c354..52cf731 100644
--- a/backend/pom.xml
+++ b/backend/pom.xml
@@ -14,7 +14,7 @@
 		<maven.compiler.source>${java.version}</maven.compiler.source>
 		<maven.compiler.target>${java.version}</maven.compiler.target>
 		<querydsl.version>5.1.0</querydsl.version>
-		<revision>0.4.0</revision>
+		<revision>0.4.3</revision>
 	</properties>
 
 	<parent>
diff --git a/backend/src/main/java/de/champonthis/buntspecht/controller/TurnoverController.java b/backend/src/main/java/de/champonthis/buntspecht/controller/TurnoverController.java
index 8c7f69d..535967a 100644
--- a/backend/src/main/java/de/champonthis/buntspecht/controller/TurnoverController.java
+++ b/backend/src/main/java/de/champonthis/buntspecht/controller/TurnoverController.java
@@ -9,7 +9,6 @@ import org.springframework.http.HttpStatus;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.util.StringUtils;
 import org.springframework.validation.Errors;
-import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -149,16 +148,14 @@ public class TurnoverController extends BaseController {
 			throw new EntityResponseStatusException(errors.getAllErrors(), HttpStatus.CONFLICT);
 		}
 
+		Turnover existing = turnoverManager.get(turnover.getId());
 		if (!hasRole("ROLE_ADMIN")) {
-			Turnover existing = turnoverManager.get(turnover.getId());
 			if (!getCurrentUsername().equals(existing.getUsername())) {
 				throw new EntityResponseStatusException(HttpStatus.FORBIDDEN);
 			}
 			turnover.setUsername(getCurrentUsername());
 		}
 
-		Turnover existing = turnoverManager.get(turnover.getId());
-
 		if (existing.equals(turnover)) {
 			throw new EntityResponseStatusException(HttpStatus.NOT_MODIFIED);
 		}
diff --git a/backend/src/main/java/de/champonthis/buntspecht/model/Turnover.java b/backend/src/main/java/de/champonthis/buntspecht/model/Turnover.java
index 4367871..134126c 100644
--- a/backend/src/main/java/de/champonthis/buntspecht/model/Turnover.java
+++ b/backend/src/main/java/de/champonthis/buntspecht/model/Turnover.java
@@ -147,24 +147,28 @@ public class Turnover {
         Turnover turnover = (Turnover) obj;
         boolean equals = true;
 
-        equals &= dueDate.equals(turnover.getDueDate());
+        equals &= dueDate == null && turnover.getDueDate() == null
+                || dueDate != null && dueDate.equals(turnover.getDueDate());
 
-        equals &= id == null && turnover.getId() == null || id.equals(turnover.getId());
+        equals &= id == null && turnover.getId() == null || id != null && id.equals(turnover.getId());
 
-        equals &= username == null && turnover.getUsername() == null || username.equals(turnover.getUsername());
+        equals &= username == null && turnover.getUsername() == null
+                || username != null && username.equals(turnover.getUsername());
 
-        equals &= customer == null && turnover.getCustomer() == null || customer.equals(turnover.getCustomer());
+        equals &= customer == null && turnover.getCustomer() == null
+                || customer != null && customer.equals(turnover.getCustomer());
 
-        equals &= motif == null && turnover.getMotif() == null || motif.equals(turnover.getMotif());
+        equals &= motif == null && turnover.getMotif() == null || motif != null && motif.equals(turnover.getMotif());
 
         equals &= price == turnover.getPrice();
 
         equals &= timeInvestment == turnover.getTimeInvestment();
 
-        equals &= remark == null && turnover.getRemark() == null || remark.equals(turnover.getRemark());
+        equals &= remark == null && turnover.getRemark() == null
+                || remark != null && remark.equals(turnover.getRemark());
 
         equals &= materialConsumption == null && turnover.getMaterialConsumption() == null
-                || materialConsumption.equals(turnover.getMaterialConsumption());
+                || materialConsumption != null && materialConsumption.equals(turnover.getMaterialConsumption());
 
         return equals;
     }
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 0122247..5387eb7 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "buntspecht-web",
-  "version": "0.4.2",
+  "version": "0.4.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "buntspecht-web",
-      "version": "0.4.2",
+      "version": "0.4.3",
       "license": "AGPL3",
       "dependencies": {
         "@angular/animations": "^18.2.7",
diff --git a/frontend/package.json b/frontend/package.json
index 5927805..6c12c5c 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "buntspecht-web",
-  "version": "0.4.2",
+  "version": "0.4.3",
   "license": "AGPL3",
   "scripts": {
     "ng": "ng",
diff --git a/frontend/src/app/pages/turnover/turnover.page.ts b/frontend/src/app/pages/turnover/turnover.page.ts
index 5f20ce5..a20ba40 100644
--- a/frontend/src/app/pages/turnover/turnover.page.ts
+++ b/frontend/src/app/pages/turnover/turnover.page.ts
@@ -145,7 +145,7 @@ export class PageTurnover implements OnInit {
     }
 
     this.working = true;
-    this.turnover.dueDate = this.form.get("dueDate").value;
+    this.turnover.dueDate = this.form.get("dueDate").value || this.turnover.created;
     this.turnover.customer = this.form.get("customer").value;
     this.turnover.motif = this.form.get("motif").value;
     this.turnover.price = this.form.get("price").value;