diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/data/DefaultFundamentalProperties.java b/ganttzk/src/main/java/org/zkoss/ganttz/data/DefaultFundamentalProperties.java
index 4b6200275..a579abd81 100644
--- a/ganttzk/src/main/java/org/zkoss/ganttz/data/DefaultFundamentalProperties.java
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/data/DefaultFundamentalProperties.java
@@ -262,4 +262,9 @@ public class DefaultFundamentalProperties implements ITaskFundamentalProperties
         return "";
     }
 
+    @Override
+    public boolean isManualAnyAllocation() {
+        return false;
+    }
+
 }
diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/data/ITaskFundamentalProperties.java b/ganttzk/src/main/java/org/zkoss/ganttz/data/ITaskFundamentalProperties.java
index dea750e50..83c3e6656 100644
--- a/ganttzk/src/main/java/org/zkoss/ganttz/data/ITaskFundamentalProperties.java
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/data/ITaskFundamentalProperties.java
@@ -105,4 +105,6 @@ public interface ITaskFundamentalProperties {
 
     String updateTooltipText(String progressType);
 
+    boolean isManualAnyAllocation();
+
 }
diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/data/Task.java b/ganttzk/src/main/java/org/zkoss/ganttz/data/Task.java
index 269c714d5..3297bdfa3 100644
--- a/ganttzk/src/main/java/org/zkoss/ganttz/data/Task.java
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/data/Task.java
@@ -454,4 +454,9 @@ public abstract class Task implements ITaskFundamentalProperties {
         return LocalDate.fromDateFields(getBeginDate().toDayRoundedDate());
     }
 
+    @Override
+    public boolean isManualAnyAllocation() {
+        return fundamentalProperties.isManualAnyAllocation();
+    }
+
 }
diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/data/TaskLeaf.java b/ganttzk/src/main/java/org/zkoss/ganttz/data/TaskLeaf.java
index 52c93b477..393d590f5 100644
--- a/ganttzk/src/main/java/org/zkoss/ganttz/data/TaskLeaf.java
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/data/TaskLeaf.java
@@ -55,7 +55,8 @@ public class TaskLeaf extends Task {
 
     @Override
     public boolean canBeExplicitlyMoved() {
-        return !(isSubcontracted() || isLimitingAndHasDayAssignments() || hasConsolidations());
+        return !(isSubcontracted() || isLimitingAndHasDayAssignments()
+                || hasConsolidations() || isManualAnyAllocation());
     }
 
 }
diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/Task.java b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/Task.java
index b75fc49c4..2a6d9c3ff 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/Task.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/planner/entities/Task.java
@@ -883,7 +883,7 @@ public class Task extends TaskElement implements ITaskPositionConstrained {
 
     @Override
     public boolean canBeExplicitlyResized() {
-        return canBeResized() && !isSubcontracted();
+        return canBeResized() && !isSubcontracted() && !isManualAnyAllocation();
     }
 
     @Override
diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/TaskElementAdapter.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/TaskElementAdapter.java
index a46de631d..a888e7650 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/TaskElementAdapter.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/TaskElementAdapter.java
@@ -1051,6 +1051,12 @@ public class TaskElementAdapter {
                         || taskElement.hasConsolidations();
             }
 
+            @Override
+            public boolean isManualAnyAllocation() {
+                return taskElement.isTask()
+                        && ((Task) taskElement).isManualAnyAllocation();
+            }
+
         }
 
         @Override