diff --git a/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricBoundaryField.C b/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricBoundaryField.C
index b95a79a138..e331062c4d 100644
--- a/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricBoundaryField.C
+++ b/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricBoundaryField.C
@@ -36,6 +36,9 @@ readField
     const dictionary& dict
 )
 {
+    // Clear the boundary field if already initialised
+    this->clear();
+
     this->setSize(bmesh_.size());
 
     if (debug)