diff --git a/src/decblupi.cxx b/src/decblupi.cxx
index 41e7419..a52ca68 100644
--- a/src/decblupi.cxx
+++ b/src/decblupi.cxx
@@ -2430,6 +2430,32 @@ bool CDecor::BlupiNextAction (Sint32 rank)
   if (!m_blupi[rank].bExist)
     return false;
 
+  /* Check if a Blupi is already doing a conflicting action at the same place.
+   * It happens for example when a blupi wants to carry an object from a
+   * direction and a second from the other direction. Without this check, the
+   * object is duplicated.
+   */
+  for (int i = 0; i < MAXBLUPI; ++i)
+  {
+    if (rank == i || !m_blupi[i].bExist)
+      continue;
+
+    if (
+      (m_blupi[rank].goalAction == EV_ACTION_CARRY ||
+       m_blupi[rank].goalAction == EV_ACTION_EAT ||
+       m_blupi[rank].goalAction == EV_ACTION_DRINK) &&
+      (m_blupi[i].goalAction == EV_ACTION_CARRY2 ||
+       m_blupi[i].goalAction == EV_ACTION_EAT2 ||
+       m_blupi[i].goalAction == EV_ACTION_DRINK2) &&
+      m_blupi[rank].goalHili.x == m_blupi[i].goalHili.x &&
+      m_blupi[rank].goalHili.y == m_blupi[i].goalHili.y)
+    {
+      BlupiInitAction (i, ACTION_STOP);
+      GoalStop (i, true);
+      return false;
+    }
+  }
+
   if (m_blupi[rank].clicDelay > 0)
     m_blupi[rank].clicDelay--;
   if (m_blupi[rank].clicDelay == 0)