FIX: ignore versioning for properties and parents

src/main/java/caosdb/server/entity/wrapper/Parent.java

@@ -57,4 +57,10 @@ public class Parent extends EntityWrapper {
   public Affiliation getAffiliation() {
     return this.affiliation;
   }
+
+  @Override
+  public boolean hasVersion() {
+    // parents are not versioned (yet).
+    return false;
+  }
 }

src/main/java/caosdb/server/entity/wrapper/Property.java

@@ -134,4 +134,10 @@ public class Property extends EntityWrapper {
   public EntityInterface getDomainEntity() {
     return this.domain;
   }
+
+  @Override
+  public boolean hasVersion() {
+    // properties are not versioned (yet).
+    return false;
+  }
 }

src/main/java/caosdb/server/entity/xml/SetFieldStrategy.java

@@ -115,7 +115,7 @@ public class SetFieldStrategy {
         // Always-true-strategy
         @Override
         public boolean isToBeSet(String field) {
-          return true;
+          return field == null || !field.equalsIgnoreCase("version");
         }
       };
     }