diff --git a/core/src/main/java/de/srsoftware/umbrella/core/model/Project.java b/core/src/main/java/de/srsoftware/umbrella/core/model/Project.java
index 2fc8397..7b11340 100644
--- a/core/src/main/java/de/srsoftware/umbrella/core/model/Project.java
+++ b/core/src/main/java/de/srsoftware/umbrella/core/model/Project.java
@@ -31,7 +31,7 @@ public class Project implements Mappable {
 		this.companyId = companyId;
 		this.showClosed = showClosed;
 		this.members = members;
-		this.allowedStates = allowedStates;
+		this.allowedStates = new ArrayList<>(allowedStates);
 	}
 
 	public Collection<Status> allowedStates(){
diff --git a/core/src/main/java/de/srsoftware/umbrella/core/model/Status.java b/core/src/main/java/de/srsoftware/umbrella/core/model/Status.java
index 2e49391..c2677ba 100644
--- a/core/src/main/java/de/srsoftware/umbrella/core/model/Status.java
+++ b/core/src/main/java/de/srsoftware/umbrella/core/model/Status.java
@@ -17,7 +17,7 @@ public record Status(String name, int code) implements Mappable {
 	public static final Status STARTED = new Status("STARTED",40); // was 20
 	public static final Status COMPLETE = new Status("COMPLETE",60);
 	public static final Status CANCELLED = new Status("CANCELLED", 100);
-	public static final List<Status> PREDEFINED = new ArrayList<>(List.of(OPEN, STARTED, PENDING, COMPLETE, CANCELLED));
+	public static final List<Status> PREDEFINED = List.of(OPEN, STARTED, PENDING, COMPLETE, CANCELLED);
 
 	public static Status of(int code){
 		return switch (code){